Jiang Xiaoli, Jang Haeseong, Liu Shangguo, Li Zijian, Kim Min Gyu, Li Chuang, Qin Qing, Liu Xien, Cho Jaephil
State Key Laboratory Base of Eco-Chemical Engineering, College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
Department of Energy Engineering, Department of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea.
Angew Chem Int Ed Engl. 2021 Feb 19;60(8):4110-4116. doi: 10.1002/anie.202014411. Epub 2020 Dec 21.
Facilitating the dissociation of water and desorption of hydrogen are both crucial challenges for improving the hydrogen evolution reaction (HER) in alkaline media. Herein, we report the synthesis of heterostructure of Ru P/WO @NPC (N, P co-doped carbon) by a simple hydrothermal reaction using ruthenium and tungsten salts as precursors, followed by pyrolyzing under an Ar atmosphere. The Ru P/WO @NPC electrocatalyst exhibits an outstanding HER activity with an overpotential of 15 mV at a current density of 10 mA cm and excellent durability in a 1.0 M KOH solution, outperforming state-of-the-art Pt/C and most reported electrocatalysts. Experimental results combined with density functional calculations reveal that the electron density redistribution in Ru P/WO @NPC is achieved by electron transfer from NPC to Ru P/WO and from Ru P to WO , which directly promotes the dissociation of water on W sites in WO and desorption of hydrogen on Ru sites in Ru P.
促进水的离解和氢的脱附都是改善碱性介质中析氢反应（HER）的关键挑战。在此，我们报告了通过简单的水热反应，以钌盐和钨盐为前驱体合成RuP/WO@NPC（N、P共掺杂碳）异质结构，随后在氩气氛下热解。RuP/WO@NPC电催化剂在1.0 M KOH溶液中表现出优异的析氢活性，在电流密度为10 mA cm时过电位为15 mV，并且具有出色的耐久性，优于目前最先进的Pt/C和大多数已报道的电催化剂。实验结果结合密度泛函计算表明，RuP/WO@NPC中的电子密度重新分布是通过电子从NPC转移到RuP/WO以及从RuP转移到WO实现的，这直接促进了WO中W位点上的水离解和RuP中Ru位点上的氢脱附。
