Ling Ying, Luo Fang, Zhang Quan, Qu Konggang, Guo Long, Hu Hao, Yang Zehui, Cai Weiwei, Cheng Hansong
Sustainable Energy Laboratory, Faculty of Materials Science and Chemistry, China University of Geosciences Wuhan, 388 Lumo RD, Wuhan 430074, China.
School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, China.
ACS Omega. 2019 Feb 26;4(2):4185-4191. doi: 10.1021/acsomega.8b03449. eCollection 2019 Feb 28.
Here, we report a stable tungsten carbide hollow microsphere (WC-HS) electrocatalyst with robust electrocatalytic activity toward hydrogen evolution reaction fabricated from carburization of tungsten oxides at 700 °C with CH/H flow, which demands overpotentials of 153 and 264 mV to deliver 10 and 100 mA cm ascribing to the hollow structures beneficial for interfacial charge transfer as well as releasing of hydrogen molecular. Meanwhile, the WC-HS electrocatalyst exhibits undetectable degradation after 20 000 potential cycles indicative of extraordinary durability; in contrast, overpotential@100 mA cm is dramatically increased from 128 to 251 mV after only 2000 potential cycles for benchmark platinum electrocatalyst.
在此，我们报道了一种稳定的碳化钨空心微球（WC-HS）电催化剂，它通过在700°C下用CH/H流对氧化钨进行渗碳制备而成，对析氢反应具有强大的电催化活性。由于空心结构有利于界面电荷转移以及氢分子的释放，该催化剂在提供10和100 mA cm时所需的过电位分别为153和264 mV。同时，WC-HS电催化剂在20000次电位循环后未检测到降解，表明其具有非凡的耐久性；相比之下，基准铂电催化剂在仅2000次电位循环后，在100 mA cm时的过电位从128 mV急剧增加到251 mV。
