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U.S.A."],"published-print":{"date-parts":[[2019,6,11]]},"abstract":"<jats:title>Significance<\/jats:title>\n                  <jats:p>\n                    A major challenge in electrocatalysis is pinpointing active sites on the surface, particularly when they are at the atomic scale. Direct electrochemical measurements of individual materials\u2019 edges have not yet been reported. Here we use the scanning electrochemical microscope (SECM) to independently image topography and local catalytic activity. The 15-nm spatial resolution and high sensitivity allowed us to distinguish the higher activities of the materials\u2019 edges from that of the fully coordinated surfaces\n                    <jats:italic>in operando<\/jats:italic>\n                    . The spatially resolved electrochemical information combined with state-of-the-art electron tomography that unravels the three-dimensional complexity of the edges and ab initio calculations revealed the intricate coordination-dependent catalytic activity of the Ni oxide nanosheet edge that is not accessible by other methods.\n                  <\/jats:p>","DOI":"10.1073\/pnas.1821091116","type":"journal-article","created":{"date-parts":[[2019,5,24]],"date-time":"2019-05-24T19:06:34Z","timestamp":1558724794000},"page":"11618-11623","update-policy":"https:\/\/doi.org\/10.1073\/pnas.cm10313","source":"Crossref","is-referenced-by-count":99,"title":["Direct high-resolution mapping of electrocatalytic activity of semi-two-dimensional catalysts with single-edge sensitivity"],"prefix":"10.1073","volume":"116","author":[{"given":"Tong","family":"Sun","sequence":"first","affiliation":[{"name":"Department of Chemistry and Biochemistry, Queens College, City University of New York, Flushing, NY 11367;"},{"name":"Chemistry Program, The Graduate Center of the City University of New York, New York, NY 10016;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dengchao","family":"Wang","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Biochemistry, Queens College, City University of New York, Flushing, NY 11367;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3424-5810","authenticated-orcid":false,"given":"Michael V.","family":"Mirkin","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Biochemistry, Queens College, City University of New York, Flushing, NY 11367;"},{"name":"Chemistry Program, The Graduate Center of the City University of New York, New York, NY 10016;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hao","family":"Cheng","sequence":"additional","affiliation":[{"name":"Department of Physics, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Xiamen University, 361005 Xiamen, China;"},{"name":"Institute of Artificial Intelligence, Xiamen University Malaysia, 439000 Sepang, Selangor, Malaysia;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jin-Cheng","family":"Zheng","sequence":"additional","affiliation":[{"name":"Department of Physics, Collaborative Innovation Center for Optoelectronic Semiconductors and Efficient Devices, Xiamen University, 361005 Xiamen, China;"},{"name":"Institute of Artificial Intelligence, Xiamen University Malaysia, 439000 Sepang, Selangor, Malaysia;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ryan M.","family":"Richards","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Colorado School of Mines, Golden, CO 80401;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3729-3148","authenticated-orcid":false,"given":"Feng","family":"Lin","sequence":"additional","affiliation":[{"name":"Department of Chemistry, Virginia Tech, Blacksburg, VA 24061;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6521-868X","authenticated-orcid":false,"given":"Huolin L.","family":"Xin","sequence":"additional","affiliation":[{"name":"Department of Physics and Astronomy, University of California, Irvine, CA 92697;"},{"name":"Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, NY 11973"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"341","published-online":{"date-parts":[[2019,5,24]]},"reference":[{"key":"e_1_3_3_1_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.1227977"},{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.1038\/nchem.1478"},{"key":"e_1_3_3_3_2","doi-asserted-by":"publisher","DOI":"10.1038\/nnano.2009.190"},{"key":"e_1_3_3_4_2","doi-asserted-by":"publisher","DOI":"10.1021\/ja407115p"},{"key":"e_1_3_3_5_2","doi-asserted-by":"publisher","DOI":"10.1039\/C5SC04486C"},{"key":"e_1_3_3_6_2","doi-asserted-by":"publisher","DOI":"10.1021\/jacs.6b01606"},{"key":"e_1_3_3_7_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.1141483"},{"key":"e_1_3_3_8_2","doi-asserted-by":"publisher","DOI":"10.1038\/nnano.2012.134"},{"key":"e_1_3_3_9_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.275.5303.1102"},{"key":"e_1_3_3_10_2","doi-asserted-by":"publisher","DOI":"10.1038\/nature16534"},{"key":"e_1_3_3_11_2","doi-asserted-by":"publisher","DOI":"10.1038\/nature20795"},{"key":"e_1_3_3_12_2","doi-asserted-by":"crossref","unstructured":"W. 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