{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,25]],"date-time":"2026-10-25T03:31:25Z","timestamp":1792899085776,"version":"4.5.0"},"reference-count":34,"publisher":"American Chemical Society (ACS)","issue":"11","license":[{"start":{"date-parts":[[2021,3,10]],"date-time":"2021-03-10T00:00:00Z","timestamp":1615334400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004681","name":"Higher Education Commission, Pakistan","doi-asserted-by":"publisher","award":["1916"],"award-info":[{"award-number":["1916"]}],"id":[{"id":"10.13039\/501100004681","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2021,3,23]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Photoelectrocatalysts are robust materials for the production of energy through different ways such as water splitting. Narrow optical band gaps and high overpotentials are limiting the development of photoelectrocatalysts. In this study, a series of Co1\u2013(x+y)FexMnyWO4 solid solutions of cobalt tungstate codoped with iron and manganese have been synthesized hydrothermally. The synthesized solid solutions have been characterized by powder XRD, UV\u2013visible spectra, cyclic voltammetry (CV), and linear sweep voltammetry (LSV). They all crystallize in a wolframite-type monoclinic crystal system with space group P2\/c. Doping of iron and manganese leads to narrowing of the optical band gap of Co1\u2013(x+y)FexMnyWO4 from 2.60 to 2.04 eV. The electrocatalytic activity toward oxygen evolution reaction of all of the samples has been evaluated through LSV measurements. It is found that the sample named C5, which is codoped with manganese and iron, has the lowest onset potential and needs the lowest overpotential to attain the targeted 5 mA cm\u20132 and standard 10 mA cm\u20132 current densities as compared with all other synthesized samples. This study shows that the synthesized tungstates can be good candidates for the photoelectrocatalytic oxygen evolution reaction.<\/jats:p>","DOI":"10.1021\/acsomega.0c05412","type":"journal-article","created":{"date-parts":[[2021,3,10]],"date-time":"2021-03-10T11:32:10Z","timestamp":1615375930000},"page":"7334-7341","source":"Crossref","is-referenced-by-count":47,"title":["Iron and Manganese Codoped Cobalt Tungstates Co1\u2013(\n                    <i>x<\/i>\n                    +\n                    <i>y<\/i>\n                    )Fe\n                    <i>x<\/i>\n                    Mn\n                    <i>y<\/i>\n                    WO4 as\nEfficient Photoelectrocatalysts for Oxygen Evolution Reaction"],"prefix":"10.1021","volume":"6","author":[{"given":"Muhammad","family":"Athar","sequence":"first","affiliation":[{"name":"Bahauddin Zakariya University , , ,","place":["Multan, Pakistan, 60800"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Muhammad","family":"Fiaz","sequence":"additional","affiliation":[{"name":"Bahauddin Zakariya University , , ,","place":["Multan, Pakistan, 60800"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Muhammad Asim","family":"Farid","sequence":"additional","affiliation":[{"name":"University of Education , , ,","place":["Lahore, Pakistan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6208-6298","authenticated-orcid":true,"given":"Muhammad","family":"Tahir","sequence":"additional","affiliation":[{"name":"Xi\u2019an Jiaotong University , , ,","place":["Xi\u2019an, China, 710049"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Muhammad Adnan","family":"Asghar","sequence":"additional","affiliation":[{"name":"Bahauddin Zakariya University , , ,","place":["Multan, Pakistan, 60800"]},{"name":"University of Education , , ,","place":["Lahore, Pakistan"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6956-5374","authenticated-orcid":true,"given":"Sadaf","family":"ul Hassan","sequence":"additional","affiliation":[{"name":"COMSATS University Islamabad , , Lahore Campus , ,","place":["Lahore, Pakistan, 54000"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7715-9173","authenticated-orcid":true,"given":"Murtaza","family":"Hasan","sequence":"additional","affiliation":[{"name":"The Islamia University of Bahawalpur , , ,","place":["Bahawalpur, Pakistan, 63100"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2021,3,10]]},"reference":[{"key":"2026081415075882600_cit1","doi-asserted-by":"publisher","first-page":"175","DOI":"10.1016\/0360-3199(94)90124-4","article-title":"Fuel cells\nand hydrogen fuel","volume":"19","author":"Appleby","year":"1994","journal-title":"Int. J. Hydrogen Energy"},{"key":"2026081415075882600_cit2","doi-asserted-by":"publisher","first-page":"9518","DOI":"10.1021\/nn503760c","article-title":"Efficient Electrocatalytic\nOxygen Evolution on Amorphous Nickel\u2013Cobalt Binary Oxide Nanoporous\nLayers","volume":"8","author":"Yang","year":"2014","journal-title":"ACS Nano"},{"key":"2026081415075882600_cit3","doi-asserted-by":"publisher","DOI":"10.1038\/ncomms12363","article-title":"Iridium-based\ndouble perovskites for efficient water oxidation in acid media","author":"Diaz-Morales","year":"2016","journal-title":"Nat. Commun."},{"key":"2026081415075882600_cit4","doi-asserted-by":"publisher","first-page":"12501","DOI":"10.1021\/acsomega.0c01383","article-title":"A-Site Cation-Ordering Layered Perovskite\nEuBa0.5Sr0.5Co2\u2013xFexO5+\u03b4 as Highly Active and Durable Electrocatalysts\nfor Oxygen Evolution\nReaction","volume":"5","author":"Wang","year":"2020","journal-title":"ACS Omega"},{"key":"2026081415075882600_cit5","doi-asserted-by":"publisher","first-page":"31","DOI":"10.1021\/acsomega.9b03550","article-title":"Recent Advances in Noble Metal (Pt, Ru, and Ir)-Based\nElectrocatalysts for Efficient Hydrogen Evolution Reaction","volume":"5","author":"Li","year":"2020","journal-title":"ACS Omega"},{"key":"2026081415075882600_cit6","doi-asserted-by":"publisher","first-page":"241","DOI":"10.1016\/j.nanoen.2012.09.002","article-title":"3D Nitrogen-doped\ngraphene prepared by pyrolysis of graphene oxide with polypyrrole\nfor electrocatalysis of oxygen reduction reaction","volume":"2","author":"Lin","year":"2013","journal-title":"Nano Energy"},{"key":"2026081415075882600_cit7","doi-asserted-by":"publisher","first-page":"7559","DOI":"10.1021\/acsomega.7b00957","article-title":"Nanosheets of NiCo2O4\/NiO as Efficient and\nStable Electrocatalyst for Oxygen Evolution Reaction","volume":"2","author":"Mahala","year":"2017","journal-title":"ACS Omega"},{"key":"2026081415075882600_cit8","doi-asserted-by":"publisher","first-page":"14971","DOI":"10.1039\/C9TA03220G","article-title":"Recent\nadvances in transition metal-based electrocatalysts for alkaline hydrogen\nevolution","volume":"7","author":"Chen","year":"2019","journal-title":"J. Mater. Chem A"},{"key":"2026081415075882600_cit9","doi-asserted-by":"publisher","first-page":"185","DOI":"10.1007\/s00339-008-4731-8","article-title":"Hydrothermal preparation and photoluminescence of bundle-like structure\nof ZnWO4 nanorods","volume":"94","author":"Song","year":"2009","journal-title":"Appl. Phys. A"},{"key":"2026081415075882600_cit10a","doi-asserted-by":"publisher","first-page":"227","DOI":"10.1016\/j.electacta.2012.07.045","article-title":"Transition metal tungstates synthesized\nby co-precipitation method: Basic photocatalytic properties","volume":"81","author":"Garci\u0301a-Pe\u0301rez","year":"2012","journal-title":"Electrochim. Acta"},{"key":"2026081415075882600_cit10b","doi-asserted-by":"publisher","first-page":"23312","DOI":"10.1016\/j.ijhydene.2016.10.117","article-title":"Synthesis, characterization\nand photocatalytic evaluation of MWO4 (M = Ni, Co, Cu and\nMn) tungstates","volume":"41","author":"Lo\u0301pez","year":"2016","journal-title":"Int. J. Hydrogen Energy"},{"key":"2026081415075882600_cit10c","doi-asserted-by":"publisher","first-page":"113","DOI":"10.1016\/j.cplett.2010.08.026","article-title":"Synthesis, characterization and photocatalytic\nperformance of transition metal tungstates","volume":"498","author":"Montini","year":"2010","journal-title":"Chem. Phys. Lett."},{"key":"2026081415075882600_cit11","doi-asserted-by":"publisher","first-page":"581","DOI":"10.1016\/j.materresbull.2003.12.014","article-title":"Electrical and humidity\nsensing properties of lead\u00ad(II)\ntungstate\u2013tungsten\u00ad(VI) oxide and zinc\u00ad(II) tungstate\u2013tungsten\u00ad(VI)\noxide composites","volume":"39","author":"Sundaram","year":"2004","journal-title":"Mater. Res. Bull."},{"key":"2026081415075882600_cit12","doi-asserted-by":"publisher","first-page":"8044","DOI":"10.1021\/am402127u","article-title":"Simple Synthesis\nof Amorphous NiWO4 Nanostructure and Its Application as\na Novel Cathode Material\nfor Asymmetric Supercapacitors","volume":"5","author":"Niu","year":"2013","journal-title":"ACS Appl. Mater.\nInterfaces"},{"key":"2026081415075882600_cit13","doi-asserted-by":"publisher","first-page":"15","DOI":"10.1016\/j.electacta.2015.01.055","article-title":"CoWO4 nanoparticles prepared\nby two methods displaying different structures and supercapacitive\nperformances","volume":"157","author":"Xing","year":"2015","journal-title":"Electrochim. Acta"},{"key":"2026081415075882600_cit14","doi-asserted-by":"publisher","first-page":"1059","DOI":"10.1016\/j.jeurceramsoc.2006.05.085","article-title":"MgWO4, ZnWO4, NiWO4 and CoWO4 microwave\ndielectric ceramics","volume":"27","author":"Pullar","year":"2007","journal-title":"J. Eur. Ceram. Soc."},{"key":"2026081415075882600_cit15","doi-asserted-by":"publisher","first-page":"L471","DOI":"10.1088\/0953-8984\/18\/39\/L01","article-title":"A new multiferroic\nmaterial: MnWO4","volume":"18","author":"Heyer","year":"2006","journal-title":"J. Phys.: Condens.\nMatter"},{"key":"2026081415075882600_cit16","doi-asserted-by":"publisher","first-page":"75","DOI":"10.1016\/j.electacta.2016.05.042","article-title":"Nanosized\nCoWO4 and NiWO4 as efficient oxygen-evolving\nelectrocatalysts","volume":"209","author":"Srirapu","year":"2016","journal-title":"Electrochim. Acta"},{"key":"2026081415075882600_cit17","doi-asserted-by":"publisher","first-page":"281","DOI":"10.1016\/j.matlet.2016.07.137","article-title":"Improved photoelectrochemical\nwater\noxidation under visible light with mesoporous CoWO4","volume":"183","author":"Ahmed","year":"2016","journal-title":"Mater. Lett."},{"key":"2026081415075882600_cit18","doi-asserted-by":"publisher","first-page":"7430","DOI":"10.1039\/c0cc01977a","article-title":"NiWO4 nanoparticles:\na promising catalyst for hydrodesulfurization","volume":"46","author":"Bi","year":"2010","journal-title":"Chem. Commun."},{"key":"2026081415075882600_cit19","doi-asserted-by":"publisher","first-page":"1082","DOI":"10.1021\/ic801806r","article-title":"Hierarchical FeWO4 Microcrystals: Solvothermal Synthesis\nand Their Photocatalytic and Magnetic Properties","volume":"48","author":"Zhou","year":"2009","journal-title":"Inorg. Chem."},{"key":"2026081415075882600_cit20","doi-asserted-by":"publisher","first-page":"24692","DOI":"10.1039\/c4ra03893b","article-title":"First-principles\nstudy of crystalline\nCoWO4 as oxygen evolution reaction catalyst","volume":"4","author":"Ling","year":"2014","journal-title":"RSC Adv."},{"key":"2026081415075882600_cit21","doi-asserted-by":"publisher","first-page":"10874","DOI":"10.1039\/c2ra21993j","article-title":"Different catalytic\nbehavior of amorphous and crystalline\ncobalt tungstate for electrochemical water oxidation","volume":"2","author":"Jia","year":"2012","journal-title":"RSC Adv."},{"key":"2026081415075882600_cit22","doi-asserted-by":"publisher","first-page":"436","DOI":"10.1016\/j.materresbull.2015.10.026","article-title":"Zn1\u2013xCoxWO4 (0 \u2264 x\n\u2264 1) full range\nsolid solution: Structure, optical properties, and magnetism","volume":"74","author":"Han","year":"2016","journal-title":"Mater. Res. Bull."},{"key":"2026081415075882600_cit23","doi-asserted-by":"publisher","first-page":"556","DOI":"10.1016\/j.pnsc.2017.08.016","article-title":"FeWO4 nanorods\nwith excellent UV\u2013Visible light\nphotocatalysis","volume":"27","author":"Gao","year":"2017","journal-title":"Prog. Nat. Sci.: Mater. Int."},{"key":"2026081415075882600_cit24","doi-asserted-by":"publisher","first-page":"2899","DOI":"10.1107\/S0567740872007186","article-title":"Accurate cell\ndimensions for ABO4 molybdates and tungstates","volume":"28","author":"Sleight","year":"1972","journal-title":"Acta Crystallogr., Sect. B: Struct. Crystallogr. Cryst. Chem."},{"key":"2026081415075882600_cit25","doi-asserted-by":"publisher","first-page":"17","DOI":"10.1007\/BF01349680","article-title":"Die Konstitution\nder Mischkristalle und die Raumfu\u0308llung der Atome","volume":"5","author":"Vegard","year":"1921","journal-title":"Z. Phys."},{"key":"2026081415075882600_cit26","doi-asserted-by":"crossref","first-page":"175","DOI":"10.1007\/978-1-4615-8705-7","volume-title":"Amorphous and Liquid\nSemiconductors","author":"Tauc","year":"1974"},{"key":"2026081415075882600_cit27","doi-asserted-by":"publisher","first-page":"7360","DOI":"10.1021\/acs.inorgchem.7b00201","article-title":"\u03b1-Ag2\u20132xZnxWO4 (0 \u2264\nx \u2264 0.25) Solid Solutions: Structure, Morphology, and Optical\nProperties","volume":"56","author":"Pereira","year":"2017","journal-title":"Inorg. Chem."},{"key":"2026081415075882600_cit28","doi-asserted-by":"publisher","first-page":"13103","DOI":"10.1007\/s10854-018-9432-2","article-title":"Structural properties of tungsten-doped\ncobalt molybdate and its application in electrochemical oxygen evolution\nreaction","volume":"29","author":"Tantraviwat","year":"2018","journal-title":"J. Mater. Sci.: Mater. Electron."},{"key":"2026081415075882600_cit29","doi-asserted-by":"publisher","first-page":"3681","DOI":"10.1002\/cctc.201700540","article-title":"Design and Development\nof Efficient Bifunctional Catalysts by Tuning the Electronic Properties\nof Cobalt\u2013Manganese Tungstate for Oxygen Reduction and Evolution\nReactions","volume":"9","author":"Karkera","year":"2017","journal-title":"ChemCatChem"},{"key":"2026081415075882600_cit30","doi-asserted-by":"publisher","first-page":"337","DOI":"10.1039\/C6CS00328A","article-title":"Electrocatalysis for the oxygen evolution reaction:\nrecent development and future perspectives","volume":"46","author":"Suen","year":"2017","journal-title":"Chem. Soc. Rev."},{"key":"2026081415075882600_cit31","doi-asserted-by":"publisher","first-page":"65","DOI":"10.1107\/S0021889869006558","article-title":"A profile\nrefinement method for nuclear and magnetic structures","volume":"2","author":"Rietveld","year":"1969","journal-title":"J. Appl. Crystallogr."},{"key":"2026081415075882600_cit32","doi-asserted-by":"publisher","first-page":"210","DOI":"10.1107\/S0021889801002242","article-title":"EXPGUI, a\ngraphical user interface for GSAS","volume":"34","author":"Toby","year":"2001","journal-title":"J. Appl.\nCrystallogr."}],"container-title":["ACS Omega"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/pubs.acs.org\/doi\/pdf\/10.1021\/acsomega.0c05412","content-type":"application\/pdf","content-version":"vor","intended-application":"unspecified"},{"URL":"https:\/\/pubs.acs.org\/acsodf\/article-pdf\/6\/11\/7334\/3726490\/ao0c05412.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"syndication"},{"URL":"https:\/\/pubs.acs.org\/acsodf\/article-pdf\/6\/11\/7334\/3726490\/ao0c05412.pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,8,14]],"date-time":"2026-08-14T19:24:42Z","timestamp":1786735482000},"score":1,"resource":{"primary":{"URL":"https:\/\/pubs.acs.org\/acsodf\/article\/6\/11\/7334\/384637\/Iron-and-Manganese-Codoped-Cobalt-Tungstates-Co1-x"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,3,10]]},"references-count":34,"journal-issue":{"issue":"11","published-online":{"date-parts":[[2021,3,10]]},"published-print":{"date-parts":[[2021,3,23]]}},"URL":"https:\/\/doi.org\/10.1021\/acsomega.0c05412","relation":{},"ISSN":["2470-1343"],"issn-type":[{"value":"2470-1343","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,3,10]]}}}