Wang Jiabo, Fu Yalin, Zhang Peng, Zhang Jie, Ma Xusen, Zhang Jibo, Chen Li
Engineering Research Centre of Jilin Provincial Higher Education University of Chemical Separation Technology, School of Petrochemical Technology, Jilin Institute of Chemical Technology, Jilin, 132022, P.R. China.
Wanhua Chemical Group Co., Ltd, Shandong, 264006, P.R. China.
Dalton Trans. 2023 Sep 26;52(37):13079-13088. doi: 10.1039/d3dt01090b.
Electrocatalysts with a high oxygen evolution reaction (OER) activity are very important for electrochemical water oxidation, but they are also challenging. In this study, N-doped graphene-like supported highly dispersed bimetallic NiCoP NPs as an efficient electrocatalyst for water oxidation were prepared by using cation exchange resin as a carbon source and by loading cobalt and nickel on D001 by a high-temperature calcination method. The designed electrocatalyst with bimetallic phosphide as the active center shows excellent OER catalytic performance, with an overpotential of 324 mV at 10 mA cm and a corresponding Tafel slope of 97.28 mV dec. The increase in NiCoP-3@GL activity may be due to the increase in surface area (933.49 m g) caused by the irregular morphology, rich interface contact, and porous structure. In addition, the strong combination of NiCoP and GL improves the structural stability and durability of the electrocatalyst. After 5000 cyclic voltammetry tests, the performance of the catalyst decreased by 16.9 %. This work provides a new idea for designing efficient bimetallic phosphide electrocatalysts.
具有高析氧反应（OER）活性的电催化剂对于电化学水氧化非常重要，但它们也具有挑战性。在本研究中，以阳离子交换树脂为碳源，通过高温煅烧法将钴和镍负载在D001上，制备了N掺杂类石墨烯负载的高度分散双金属NiCoP纳米颗粒作为高效的水氧化电催化剂。以双金属磷化物为活性中心设计的电催化剂表现出优异的OER催化性能，在10 mA cm时过电位为324 mV，相应的塔菲尔斜率为97.28 mV dec。NiCoP-3@GL活性的提高可能是由于不规则形态、丰富的界面接触和多孔结构导致表面积增加（933.49 m g）。此外，NiCoP与GL的强结合提高了电催化剂的结构稳定性和耐久性。经过5000次循环伏安测试后，催化剂的性能下降了16.9%。这项工作为设计高效的双金属磷化物电催化剂提供了新思路。
