Angewandte Chemie - International Edition p. 16114 - 16119 (2018)
Update date:2022-08-11
Topics:
He, Sisi
Ni, Fenglou
Ji, Yujin
Wang, Lie
Wen, Yunzhou
Bai, Haipeng
Liu, Gejun
Zhang, Ye
Li, Youyong
Zhang, Bo
Peng, Huisheng
Enhancing the p-orbital delocalization of a Bi catalyst (termed as POD-Bi) via layer coupling of the short inter-layer Bi?Bi bond facilitates the adsorption of intermediate *OCHO of CO2 and thus boosts the CO2 reduction reaction (CO2RR) rate to formate. X-ray absorption fine spectroscopy shows that the POD-Bi catalyst has a shortened inter-layer bond after the catalysts are electrochemically reduced in situ from original BiOCl nanosheets. The catalyst on a glassy carbon electrode exhibits a record current density of 57 mA cm?2 (twice the state-of-the-art catalyst) at ?1.16 V vs. RHE with an excellent formate Faradic efficiency (FE) of 95 %. The catalyst has a record half-cell formate power conversion efficiency of 79 % at a current density of 100 mA cm?2 with 93 % formate FE when applied in a flow-cell system. The highest rate of the CO2RR production reported (391 mg h?1 cm2) was achieved at a current density of 500 mA cm?2 with formate FE of 91 % at high CO2 pressure.
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Doi:10.1248/cpb.22.2489
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