Bimetal-Organic Framework-Derived Porous Rodlike Cobalt/Nickel Nitride for All-pH Value Electrochemical Hydrogen Evolution

Xiaogeng Feng; Haixu Wang; Xiangjie Bo; Liping Guo

doi:10.1021/acsami.8b21369

Bimetal-Organic Framework-Derived Porous Rodlike Cobalt/Nickel Nitride for All-pH Value Electrochemical Hydrogen Evolution

ACS Appl Mater Interfaces. 2019 Feb 27;11(8):8018-8024. doi: 10.1021/acsami.8b21369. Epub 2019 Feb 15.

Authors

Xiaogeng Feng¹, Haixu Wang¹, Xiangjie Bo¹, Liping Guo¹

Affiliation

¹ Key Laboratory of Nanobiosensing and Nanobioanalysis at Universities of Jilin Province, Faculty of Chemistry , Northeast Normal University , Changchun 130024 , P. R. China.

PMID: 30721621
DOI: 10.1021/acsami.8b21369

Abstract

Developing advanced hydrogen evolution reaction (HER) electrocatalysts is of great significance. Herein, we report porous rodlike cobalt-nickel bimetal nitrides (Co _xNi _yN) as high-efficiency HER electrocatalysts in a wide pH range through nitridation from a bimetal-organic framework (MOF-74) precursor. Thanks to collaborative superiorities of high surface areas, abundant mesoporous structure, perfect metal element dispersion, and electron modulation effect, the as-prepared Co _xNi _yN possess a superior catalytic ability toward HER at all pH values. In particular, the optimal Co₂Ni₁N requires overpotentials of 102.6 and 92.0 mV to afford a current density of 10 mA cm^-2 in alkaline and acidic solution, respectively. In addition, it also presents favorable activity in neutral media and excellent stability under different pH conditions. The present study not only offers a strategy for the design and synthesis of porous bimetal nitrides derived from binuclear MOF but also brings up new avenues for the development of cost-effective and competent all-pH HER catalysts for renewable energy systems.

Keywords: all pH values; bimetal−organic framework derivatives; hydrogen evolution reaction; porous cobalt−nickel bimetal nitride; synergic catalytic effect.