Xing Yulin, Chen Huihuang, Liu Yan, Sheng Yelin, Zeng Jie, Geng Zhigang, Bao Jun
Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes, Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
Chem Commun (Camb). 2021 Feb 15;57(12):1502-1505. doi: 10.1039/d0cc06756c.
Electroreduction of CO2 to HCOOH with high current densities and efficiencies remains a challenge. Herein, we developed a metallic Bi catalyst with abundant grain boundaries through the electrochemical transformation of BiPO4 nanorods to boost the catalytic performance of the electroreduction of CO2 to HCOOH. The phosphate-derived Bi catalyst (PD-Bi) achieved an FE of 91.9% for HCOOH at a high current density of -600.0 mA cm-2. Mechanistic study revealed that the abundant grain boundaries within PD-Bi promoted the adsorption of CO2 and stabilization of the CO2˙- intermediate, resulting in facilitated CO2 activation and thus enhanced catalytic performance.
在高电流密度和高效率下将二氧化碳电还原为甲酸仍然是一个挑战。在此，我们通过将磷酸铋纳米棒进行电化学转变，开发了一种具有丰富晶界的金属铋催化剂，以提高将二氧化碳电还原为甲酸的催化性能。这种源自磷酸盐的铋催化剂（PD-Bi）在-600.0 mA cm-2的高电流密度下实现了91.9%的甲酸法拉第效率。机理研究表明，PD-Bi内丰富的晶界促进了二氧化碳的吸附以及CO2˙-中间体的稳定，从而促进了二氧化碳的活化，进而提高了催化性能。
