Two biologically inspired tetranuclear nickel(II) catalysts: effect of the geometry of Ni4 core on electrocatalytic water oxidation

Wang, Jinmiao; Meng, Xiangmin; Xie, Wangjing; Zhang, Xia; Yu, Fan; Wang, Mei

doi:10.1007/s00775-020-01846-4

Cited by 9 publications

(11 citation statements)

References 67 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Both heterogeneous [34][35][36][37][38][39] and homogeneous catalysts [40][41][42][43][44] for driving water oxidation coupled with CO 2 reduction have been investigated. Nevertheless, in contrast with heterogeneous catalyst, homogeneous catalysts shows many merits such as easily adjusting the molecular and electronic configuration and profoundly clarifying the catalytic mechanism.…”

Section: Introductionmentioning

confidence: 99%

Bioinspired cobalt molecular electrocatalyst for water oxidation coupled with carbon dioxide reduction

Yin

Zhang

Wang

et al. 2021

Applied Organom Chemis

Self Cite

View full text Add to dashboard Cite

To mimic photosynthesis in green plants, it is a crucial challenge to drive water oxidation and CO 2 reduction in one single system. In this study, we present a bioinspired trinuclear pyridinedicarboxylate cobalt complex (Et 3 NH) 2 [Co III 2 Co II (OH 2 )(pda) 5 ]ÁH 2 O (1) that is capable of homogeneously electrocatalytic water oxidation and CO 2 reduction simultaneously. The designed mix-valent cobalt complex is in a V-configuration composed of two terminal Co III ions and one central Co II ion coordinated with one water ligand, which is resemble to aqua ligation of the natural catalytic complex in oxygenevolving complex (OEC). The electrochemical results show that this trinuclear cobalt complex could electrocatalyze water oxidation under neutral condition at the potentials of 1.15 V and 2.00 V versus NHE, with the Faraday efficiency as high as about 96% and 82%, and the TOF of 2.22 and 10.20 s À1 , respectively. Meanwhile, it also displays electrocatalytic activity for the reduction of CO 2 to CO with the TOF of 0.93 s À1 . The cobalt complex has good catalytic performance for the conversion of H 2 O and CO 2 into O 2 and CO, respectively, which may be mainly due to the key role of the flexible water ligand on the central Co II ion in the catalytic process. This work represents the first multinuclear cobalt complex for mimicking bio-system to drive water oxidation coupled with carbon dioxide reduction simultaneously.

show abstract

Section: Introductionmentioning

confidence: 99%

Bioinspired cobalt molecular electrocatalyst for water oxidation coupled with carbon dioxide reduction

Yin

Zhang

Wang

et al. 2021

Applied Organom Chemis

Self Cite

View full text Add to dashboard Cite

show abstract

“…It is suggested that the Ni coordination compound species form aggregations of molecular species before the decomposition and then decompose to Ni (hydr)oxide. Different methods have been reported for synthesizing OER catalysts, − and the decomposition of metal coordination compounds is also a promising method for this purpose.…”

Section: Results and Discussionmentioning

confidence: 99%

Water Oxidation in the Presence of a Nickel Coordination Compound: Decomposition Products, Fe Impurity in the Electrolyte, and a Candidate as a Catalyst

et al. 2022

View full text Add to dashboard Cite

Sustainable energy sources require a large-scale storage system. Water electrolysis toward hydrogen formation is a remarkable method for energy storage. However, oxygen-evolution reaction (OER) through water-oxidation reaction is a bottleneck in water-splitting systems. Different Ni-based molecular structures have been claimed to be OER catalysts. However, the impact of Ni (hydr)oxides formed by the degradation of Ni-based molecular structures on OER is a challenging issue. The effect of electrolyte impurity on OER in the presence of metal coordination compounds is rarely investigated. In this study, five important questions are considered regarding OER in the presence of a Ni coordination compound: (i) In which potential does the coordination compound start to be decomposed? (ii) After how many CVs does the decomposition occur? (iii) What is the effect of Fe impurity on OER in the presence of the Ni coordination compound? (iv) What is the product of the decomposition of the Ni coordination compound? (v) What is the true catalyst for OER in the presence of the Ni coordination compound? The roles of both the Fe impurity in the electrolyte and the Ni (hydr)oxide formed in the presence of a Ni coordination compound are investigated. The experiments showed that in the presence of the Ni coordination compound, Ni (hydr)oxide and Fe impurity in KOH formed a Ni–Fe oxide-based catalyst during OER, which is an efficient catalyst for OER. Fe impurity is a key contributor to observing OER in the presence of this Ni coordination compound.

show abstract

“…Compound 1 is interesting for OER because it is a metal complex with earth-abundant metal nickel and a tetranuclear nickel(II) biomimetic cubanelike structure. 36 Indeed, the biological OER catalyst is a highly active tetranuclear Mn cluster Mn 4 CaO 5 with a cubanelike structure, which can accumulate and transfer electrons and protons. 13 ■ EXPERIMENTAL SECTION See the Supporting Information.…”

Section: ■ Introductionmentioning

confidence: 99%

Application of a Nickel Complex for Water Oxidation under Neutral and Acidic Conditions

Kalantarifard

Akbari

Aleshkevych

et al. 2023

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Water splitting for large-scale hydrogen production is a method for storing sustainable but intermittent energy sources. Oxygen evolution reaction (OER) through the water oxidation reaction provides low-cost electrons for the formation of hydrogen. OER is a complicated, sluggish reaction and a bottleneck for water splitting. Herein, first, a tetranuclear Ni complex with di(2-pyridyl) ketone (compound 1) has been synthesized. In the next step, OERs in the presence of compound 1 at pHs 3.0 and 7.0 have been investigated. The study attempts to answer the following questions for the metal complex during OER: (i) what is the true catalyst for OER in the presence of a Ni complex under neutral or acidic conditions? (ii) Why is low OER observed in the presence of a Ni complex under neutral or acidic conditions? The experiments show that the Ni-oxo cluster of γ-NiO(OH) is formed during OER in the presence of compound 1 at pHs 3.0 and 7.0. In addition, compound 1 is reduced on the counter electrode surface at pH 3.0 during OER. The reduced complex is characterized by Raman spectroscopy and electron paramagnetic resonance as a Ni(I) complex, which is unstable and decomposed after a few hours. Thus, a metal complex must be stable on the working electrode surface and the counter electrode surface for OER in a single-cell setup.

show abstract

Two biologically inspired tetranuclear nickel(II) catalysts: effect of the geometry of Ni4 core on electrocatalytic water oxidation

Cited by 9 publications

References 67 publications

Bioinspired cobalt molecular electrocatalyst for water oxidation coupled with carbon dioxide reduction

Bioinspired cobalt molecular electrocatalyst for water oxidation coupled with carbon dioxide reduction

Water Oxidation in the Presence of a Nickel Coordination Compound: Decomposition Products, Fe Impurity in the Electrolyte, and a Candidate as a Catalyst

Application of a Nickel Complex for Water Oxidation under Neutral and Acidic Conditions

Contact Info

Product

Resources

About