Electrocatalytic Coenhancement of Bimetallic Polyphthalocyanine‐Anchored Ru Nanoclusters Enabling Efficient Overall Water Splitting at Ampere‐Level Current Densities

Author:

Chen Hao1,Ding Rong1,Liu Bo‐Wen1,Zeng Fu‐Rong1,Zhao Hai‐Bo1ORCID

Affiliation:

1. The Collaborative Innovation Center for Eco‐Friendly and Fire‐Safety Polymeric Materials National Engineering Laboratory of Eco‐Friendly Polymeric Materials (Sichuan) College of Chemistry Sichuan University. No. 24, South Section 1, Yihuan Road Chengdu Sichuan 610064 China

Abstract

AbstractEfficient electrocatalysts capable of operating continuously at industrial ampere‐level current densities are crucial for large‐scale applications of electrocatalytic water decomposition for hydrogen production. However, long‐term industrial overall water splitting using a single electrocatalyst remains a major challenge. Here, bimetallic polyphthalocyanine (FeCoPPc)‐anchored Ru nanoclusters, an innovative electrocatalyst comprising the hydrogen evolution reaction (HER) active Ru and the oxygen evolution reaction (OER) active FeCoPPc, engineered for efficient overall water splitting are demonstrated. By density functional theory calculations and systematic experiments, the electrocatalytic coenhancement effect resulting from unique charge redistribution, which synergistically boosts the HER activity of Ru and the OER activity of FeCoPPc by optimizing the adsorption energy of intermediates, is unveiled. As a result, even at a large current density of 2.0 A cm−2, the catalyst exhibits low overpotentials of 220 and 308 mV, respectively, for HER and OER. It exhibits excellent stability, requiring only 1.88 V of cell voltage to achieve a current density of 2.0 A cm−2 in a 6.0 m KOH electrolyte at 70 °C, with a remarkable operational stability of over 100 h. This work provides a new electrocatalytic coenhancement strategy for the design and synthesis of electrocatalyst, paving the way for industrial‐scale overall water splitting applications.

Funder

National Natural Science Foundation of China

Fundamental Research Funds for the Central Universities

Publisher

Wiley

Subject

Biomaterials,Biotechnology,General Materials Science,General Chemistry

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