Bimetallic nickel-cobalt hydrides in H2 activation and catalytic proton reduction

Xiaoxiao Chu; Jihao Jin; Bangrong Ming; Maofu Pang; Xin Yu; Chen-Ho Tung; Wenguang Wang

doi:10.1039/c8sc04346a

Bimetallic nickel-cobalt hydrides in H₂ activation and catalytic proton reduction

Chem Sci. 2018 Oct 30;10(3):761-767. doi: 10.1039/c8sc04346a. eCollection 2019 Jan 21.

Authors

Xiaoxiao Chu^{1

2}, Jihao Jin¹, Bangrong Ming¹, Maofu Pang¹, Xin Yu¹, Chen-Ho Tung¹, Wenguang Wang¹

Affiliations

¹ Key Lab for Colloid and Interface Chemistry of Education Ministry , School of Chemistry and Chemical Engineering , Shandong University , 250100 , China . Email: wwg@sdu.edu.cn.
² School of Chemistry and Materials Science , Ludong University , Yantai , 264025 , China.

Abstract

The synergism of the electronic properties of nickel and cobalt enables bimetallic NiCo complexes to process H₂. The nickel-cobalt hydride [(dppe)Ni(pdt)(H)CoCp*]⁺ ([1H]⁺ ) arising from protonation of the reduced state 1 was found to be an efficient electrocatalyst for H₂ evolution with Cl₂CHCOOH, and the oxidized [Ni(ii)Co(iii)]²⁺ form is capable of activating H₂ to produce [1H]⁺ . The features of stereodynamics, acid-base properties, redox chemistry and reactivity of these bimetallic NiCo complexes in processing H₂ are potentially related to the active site of [NiFe]-H₂ases.