Wang Zhiwei, Guo Zihan, Gao Yanfang, Wang Dong, Cui Xiaoming
School of Chemical Engineering, Engineering Research Center of Large-scale Energy Storage Technology, Ministry of Education, Inner Mongolia University of Technology, Hohhot 010051, P.R. China.
School of Business Administration, Inner Mongolia University of Finance and Economics, Hohhot 010070, P.R. China.
ACS Appl Mater Interfaces. 2023 Mar 22;15(11):14206-14214. doi: 10.1021/acsami.2c19983. Epub 2023 Mar 13.
To achieve global carbon neutrality, the realization of highly active and stable catalysts is critical for water splitting to produce green hydrogen (H). MoS is considered to be the most promising non-precious metal catalyst for H evolution because of its excellent properties. Herein, we report a metal-phase MoS (1T-MoS) synthesized using a simple hydrothermal method. Using a similar procedure, we synthesize a monolithic catalyst (MC) in which 1T-MoS is vertically bonded to a metal molybdenum plate via strong covalent bonds. These properties endow the MC with an extremely low-resistance interface and mechanical robustness, equipping it with outstanding durability and fast charge transfer. Results show that the MC can achieve stable water splitting at 350 mA cm current density with a low 400 mV overpotential. The MC exhibits negligible performance decay after 60 h of operation at a large current density of 350 mA cm. This study provides a novel possible MC with robust and metallic interfaces to achieve technically high current water splitting to produce green H.
为实现全球碳中和，对于水分解制绿氢（H）而言，实现高活性和稳定的催化剂至关重要。由于其优异的性能，MoS被认为是最有前途的析氢非贵金属催化剂。在此，我们报道了一种采用简单水热法合成的金属相MoS（1T-MoS）。使用类似的方法，我们合成了一种整体催化剂（MC），其中1T-MoS通过强共价键垂直键合到金属钼板上。这些特性赋予了MC极低电阻的界面和机械稳定性，使其具有出色的耐久性和快速的电荷转移能力。结果表明，MC在350 mA cm的电流密度下，过电位低至400 mV时能够实现稳定的水分解。在350 mA cm的大电流密度下运行60小时后，MC的性能衰减可忽略不计。本研究提供了一种具有坚固金属界面的新型整体催化剂，以实现技术上高电流的水分解制绿氢。
