H2 Evolution from Electrocatalysts with Redox-Active Ligands: Mechanistic Insights from Theory and Experiment vis-à-vis Co-Mabiq.
H2 Evolution from Electrocatalysts with Redox-Active Ligands: Mechanistic Insights from Theory and Experiment vis-à-vis Co-Mabiq.
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具有氧化还原活性配体的电催化剂的 H2 演化:理论和实验与 Co-Mabiq 的机理见解
DOI:
10.1021/acs.inorgchem.1c01157
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发表时间:
2021
影响因子:
4.6
通讯作者:
de Vivie-Riedle
中科院分区:
文献类型:
--
作者:
Reiter;Freiberg;Reinschlüssel;Gasteiger;de Vivie-Riedle
Electrocatalytic hydrogen production via transition metal complexes offers a promising approach for chemical energy storage. Optimal platforms to effectively control the proton and electron transfer steps en route to H2evolution still need to be established, and redox-active ligands could play an important role in this context. In this study, we explore the role of the redox-active Mabiq (Mabiq = 2–4:6–8-bis(3,3,4,4-tetramethlyldihydropyrrolo)-10–15-(2,2-biquinazolino)-[15]-1,3,5,8,10,14-hexaene1,3,7,9,11,14-N6) ligand in the hydrogen evolution reaction (HER). Using spectro-electrochemical studies in conjunction with quantum chemical calculations, we identified two precatalytic intermediates formed upon the addition of two electrons and one proton to [CoII(Mabiq)(THF)](PF6) (CoMbq). We further examined the acid strength effect on the generation of the intermediates. The generation of the first intermediate,CoMbq-H1, involves proton addition to the bridging imine-nitrogen atom of the ligand and requires strong proton activity. The second intermediate,CoMbq-H2, acquires a proton at the diketiminate carbon for which a weaker proton activity is sufficient. We propose two decoupled H2evolution pathways based on these two intermediates, which operate at different overpotentials. Our results show how the various protonation sites of the redox-active Mabiq ligand affect the energies and activities of HER intermediates.
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影响因子:
4.5
作者:
G. C. Tok;Anna T. S. Freiberg;H. Gasteiger;Corinna R. Hess
通讯作者:
G. C. Tok;Anna T. S. Freiberg;H. Gasteiger;Corinna R. Hess
影响因子:
4.6
作者:
Kyle E Rosenkoetter;M. K. Wojnar;Bronte J Charette;J. Ziller;A. F. Heyduk
通讯作者:
A. F. Heyduk
DOI:
10.1002/wcms.1394
发表时间:
2018-10
期刊:
Wiley Interdisciplinary Reviews: Computational Molecular Science
影响因子:
--
作者:
C. Marian;Adrian Heil;M. Kleinschmidt
通讯作者:
C. Marian;Adrian Heil;M. Kleinschmidt
DOI:
10.1063/1.5003246
发表时间:
2017
期刊:
The Journal of chemical physics
影响因子:
--
作者:
A. Heil;C. M. Marian
通讯作者:
C. M. Marian
影响因子:
4.6
作者:
E. Puttock;P. Banerjee;Manuel Kaspar;Liam Drennen;D. Yufit;E. Bill;Stephen Sproules;Corinna R. Hess
通讯作者:
Corinna R. Hess