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The surface of the TiO<jats:sub>2<\/jats:sub>\/FTO film was covered with assemblies of TiO<jats:sub>2<\/jats:sub> nanoparticles with a diameter of approximately 20\u2005nm. Under irradiation by using a Xe lamp, splitting of formic acid was performed at different applied current densities. Compared to splitting water or utilizing FTO and Pt foil as the anode, the splitting voltage is much lower and can be as low as \u22120.27\u2005V. The results show that the splitting voltage is related to the concentration of free formate groups. The evolution rate of hydrogen measured by using gas chromatography is 130\u2005\u03bcmol\u2009h<jats:sup>\u22121<\/jats:sup> at a current density of 20\u2005mA\u2009cm<jats:sup>\u22122<\/jats:sup> and the energy\u2010conversion efficiency can be 1.79\u2009%. Photoelectrolysis of formic acid has the potential to be an efficient way to produce hydrogen with a high energy\u2010conversion efficiency.<\/jats:p>","DOI":"10.1002\/cssc.201100167","type":"journal-article","created":{"date-parts":[[2011,8,31]],"date-time":"2011-08-31T22:51:59Z","timestamp":1314831119000},"page":"1475-1480","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["Hydrogen Production by Photoelectrochemically Splitting Solutions of Formic Acid"],"prefix":"10.1002","volume":"4","author":[{"given":"Lei","family":"Li","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wenliang","family":"Guo","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yusong","family":"Zhu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuping","family":"Wu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2011,8,25]]},"reference":[{"key":"e_1_2_6_1_2","first-page":"13","volume-title":"Hydrogen Energy: Challenges and Prospects","author":"Rand D. 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