First Author:Guo, Liutao

Correspondence Author:Xu, Junli, Hong-Bin Sun

Co author:Xu, Wenjuan Sun, Zejun Feng, Yanru Li, Chengrui Li, Hong Liang, Qionglin

Journal:Journal of the Taiwan Institute of Chemical Engineers

Volume:132

DOI number:10.1016/j.jtice.2021.10.018

Affiliation of Author(s):Department of Chemistry, Northeastern University

Teaching and Research Group:物理化学

Place of Publication:NETHERLANDS

Abstract:Background: The development of high-efficiency electrocatalysts that surpass Pt-based catalyst to achieve moreefficient hydrogen evolution reactions (HER) is significant. Methods: Herein, we constructed a series of highly dispersed rhodium (Rh) catalysts anchored on the Ni based layered double hydrotalcite, which were formed by the in-situ etching-growth of nickel-metal organic frameworks (Ni-MOFs). These electrocatalysts not only exhibit outstanding performance in HER, but also in urea oxidation reaction (UOR). Significant findings: The nickel-aluminum layered double hydroxide anchored Rh (Rh-NiAl LDH/NF) has the best catalytic activity for HER. It only needs an overpotential of 14 mV to reach a current density of 10 mAcm2in1.0 MKOH, which is in the top class of the currently reported HER catalysts. In addition, the catalyst Rh-NiFe LDH/NF has good catalytic performance for UOR, and it only needs an ultra-low potential of 1.30 V to reach 10 mA cm2. Hence, we constructed an electrolytic cell with the two electrodes for the urea assisted hydrogen production, which is an energy-saving protocol for HER. The current density of 50 mA cm2can be reached when the cell voltage is only 1.40 V, which is 150 mV less than the traditional water splitting to produce H2.

Key Words:ElectrocatalystHydrogenLayered double hydroxide carrierRhodiumUrea

Document Code:WOS:000819933600003

Discipline:Natural Science

First-Level Discipline:Chemistry

Page Number:10418

ISSN No.:1876-1070

Translation or Not:no