DataVXACS Energy LettersPaper
journal article·2024-01-12

Unraveling How Local Environments Impact Multicarbon Product Electrosynthesis in Active Carbon Solutions

Jundong Wang, Zhongshuo Zhang, Weixing Wu, Yingying Liu, Bin Dong, Ying Wang, Yuhang Wang

ACS Energy Letters· Volume 9· Issue 1
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Source abstract

Abstract

The direct electrochemical conversion of bicarbonate electrolytes presents the potential to produce carbon-neutral chemical commodities without suffering energy-intensive ex situ carbon dioxide (CO 2 ) regeneration. However, selectively producing multicarbon (C 2+ ) products in bicarbonate electrolyzers is challenging. In this work, we improved the selectivity toward C 2+ products using carbon-supported Cu 2 O-derived Cu (OD-Cu/C) catalysts by altering the carbon fraction, catalyst mass loading, and KHCO 3 concentration. On a Cu 2 O/C precatalyst with 10 wt % C (Cu 2 O/10 wt % C) and a 0.5 ± 0.1 mg cm –2 mass loading, we achieved here a C 2+ product Faradaic efficiency (FE) of ∼31 ± 5% at 100 mA cm –2 in 0.1 M KHCO 3 . We reported a C 2+ FE of ∼48% at 60 mA cm –2 . A one-dimensional (1D) continuum model reveals that the bicarbonate concentration and catalyst layer porosity contribute to modulating the local environment. Matching the buffer capacity, bicarbonate availability, and carbonate transport is essential for achieving high-performance bicarbonate-to-C 2+ reduction.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storageCatalysis & surfaces

OpenAlex topics: CO2 Reduction Techniques and Catalysts · Advanced battery technologies research · Ionic liquids properties and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, 199 Ren’ai Road, Suzhou, Jiangsu 215123, China

Jiangsu Key Laboratory for Advanced Negative Carbon Technologies, Soochow University, 199 Ren’ai Road, Suzhou, Jiangsu 215123, China

Department of Chemistry, Chinese University of Hong Kong, Ma Lin building, Shatin, 999077 N.T. Hong Kong SAR, China

Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China

Funding

Suzhou Key Laboratory of Functional Nano and Soft Materials · Collaborative Innovation Center of Suzhou Nano Science and Technology · Research Grants Council, University Grants Committee · Soochow University · Jiangsu Provincial Department of Education · Natural Science Foundation of Jiangsu Province · National Natural Science Foundation of China · Higher Education Discipline Innovation Project · Chinese University of Hong Kong · Joint International Research Laboratory of Carbon-Based Functional Materials and Devices · Program of Soochow Innovation and Entrepreneurship Leading Talents

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