Kirkendall Effect‐Driven Interface Engineering Facilitates Water Dissociation for Dual‐Site H<sub>2</sub>O<sub>2</sub> Electrosynthesis Simultaneously at the Anode and Cathode
Abstract
AbstractThe direct integration of renewable energy into H2O2 electrosynthesis systems offers a promising strategy to minimize energy losses and costs. Due to the intermittency of renewable energy, the dual‐site catalysts must efficiently enable both the two‐electron oxygen reduction reaction (2e− ORR) and water oxidation reaction (2e− WOR). The Kirkendall effect was employed to engineer interfaces and construct a NiZnOx─C catalyst with exposed (100) facets. The hetero‐cluster NiOx induces oxygen vacancies and built‐in electric fields, which facilitate water activation and subsequent formation of hydrogen and hydroxyl radicals, thereby enabling a single catalyst to rapidly electrosynthesize H2O2 at both the anode and cathode. Notably, 2e− ORR on the cathode enabled rapid synthesis of high‐concentration H2O2 (33987 mg L−1, 33.18 mol gcatalyst−1 h−1). NiZnOx─C achieves stable 2e− ORR/WOR coupling in a continuous‐flow reactor, operating reliably for 4 h under simulated alternating current (AC) and peaking at a total Faradaic efficiency of 150.9% under amperage‐level direct currents. This work provides insights into interface engineering based on the Kirkendall effect, demonstrating the feasibility of directly integrating intermittent renewable energy into H2O2 electrosynthesis systems.
Article Details
Authors (13)
Xin‐Hao Cai
Shenzhen Key Laboratory of Ecological Remediation and Carbon Sequestration Key Laboratory of Microorganism Application and Risk Control Ministry of Ecology and Environment State Key Laboratory of Regional Environment and Sustainability Institute of Environment and Ecology Shenzhen International Graduate School Tsinghua University Shenzhen 518055 P.R. China
Lu Peng
Ping Zhu
Peng‐Hui Liu
Shenzhen Key Laboratory of Ecological Remediation and Carbon Sequestration Key Laboratory of Microorganism Application and Risk Control Ministry of Ecology and Environment State Key Laboratory of Regional Environment and Sustainability Institute of Environment and Ecology Shenzhen International Graduate School Tsinghua University Shenzhen 518055 P.R. China
Yuan‐Chu Qin
Shenzhen Key Laboratory of Ecological Remediation and Carbon Sequestration Key Laboratory of Microorganism Application and Risk Control Ministry of Ecology and Environment State Key Laboratory of Regional Environment and Sustainability Institute of Environment and Ecology Shenzhen International Graduate School Tsinghua University Shenzhen 518055 P.R. China
Zi‐Bo Jing
Shenzhen Key Laboratory of Ecological Remediation and Carbon Sequestration Key Laboratory of Microorganism Application and Risk Control Ministry of Ecology and Environment State Key Laboratory of Regional Environment and Sustainability Institute of Environment and Ecology Shenzhen International Graduate School Tsinghua University Shenzhen 518055 P.R. China
Hao‐Jie Zhu
Institute of Materials Research Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 P.R. China
Cheng‐Cheng Huang
Shenzhen Key Laboratory of Ecological Remediation and Carbon Sequestration Key Laboratory of Microorganism Application and Risk Control Ministry of Ecology and Environment State Key Laboratory of Regional Environment and Sustainability Institute of Environment and Ecology Shenzhen International Graduate School Tsinghua University Shenzhen 518055 P.R. China
Jung‐Hyun Son
Shenzhen Key Laboratory of Ecological Remediation and Carbon Sequestration Key Laboratory of Microorganism Application and Risk Control Ministry of Ecology and Environment State Key Laboratory of Regional Environment and Sustainability Institute of Environment and Ecology Shenzhen International Graduate School Tsinghua University Shenzhen 518055 P.R. China
Ju‐Won Lee
Shenzhen Key Laboratory of Ecological Remediation and Carbon Sequestration Key Laboratory of Microorganism Application and Risk Control Ministry of Ecology and Environment State Key Laboratory of Regional Environment and Sustainability Institute of Environment and Ecology Shenzhen International Graduate School Tsinghua University Shenzhen 518055 P.R. China
Yan‐Lin Chen
Shenzhen Key Laboratory of Ecological Remediation and Carbon Sequestration Key Laboratory of Microorganism Application and Risk Control Ministry of Ecology and Environment State Key Laboratory of Regional Environment and Sustainability Institute of Environment and Ecology Shenzhen International Graduate School Tsinghua University Shenzhen 518055 P.R. China
Wen‐Long Wang
Shenzhen Key Laboratory of Ecological Remediation and Carbon Sequestration Key Laboratory of Microorganism Application and Risk Control Ministry of Ecology and Environment State Key Laboratory of Regional Environment and Sustainability Institute of Environment and Ecology Shenzhen International Graduate School Tsinghua University Shenzhen 518055 P.R. China
Qian‐Yuan Wu
Shenzhen Key Laboratory of Ecological Remediation and Carbon Sequestration Key Laboratory of Microorganism Application and Risk Control Ministry of Ecology and Environment State Key Laboratory of Regional Environment and Sustainability Institute of Environment and Ecology Shenzhen International Graduate School Tsinghua University Shenzhen 518055 P.R. China