研究目的
The exploration of non-noble-metal bifunctional electrocatalysts with high activity and stability for overall water splitting is crucial, but remains challenging for hydrogen fuel production.
研究成果
The B,N,S-CoP@C@rGO electrocatalyst demonstrated enhanced electron transfer ability, abundantly exposed active sites, and strongly synergistic coupling effect between the components, driving a current density of 10 mA cm–2 at low overpotentials for both HER and OER. The overall water splitting electrolyzer achieved a current density of 10 mA cm–2 at only 1.50 V, showcasing great promise for practical water electrolysis.
研究不足
The study does not explicitly mention limitations, but potential areas for optimization could include further enhancing the stability and activity of the electrocatalysts under a wider range of conditions and scaling up the synthesis process for industrial applications.
1：Experimental Design and Method Selection:
The study involved the synthesis of B,N,S-tri-doped composites (B,N,S-CoP@C@rGO) via pyrolysis of a graphene oxide-coated zeolitic imidazolate framework-67 (ZIF-67@GO) in the presence of [N(CH3)4]B3H8 and NaH2PO2, followed by thiourea addition. The methodology aimed to tune the charge transfer ability and catalytic performance of the composites by incorporating multiple heteroatoms.
2：Sample Selection and Data Sources:
The samples included B,N,S-CoP@C@rGO, B,N-CoP@C@rGO, N-CoP@C@rGO, and N-CoP@C composites, synthesized under varying conditions to study the effect of heteroatom doping.
3：List of Experimental Equipment and Materials:
Equipment used included a tube furnace for pyrolysis, FESEM (ZEIS, Ultra-55), TEM (JEOL JEM-2100F), XRD (D8 ADVANCE), XPS (XSAM-800), and an Autosorb IQ Gas Sorption System for BET surface area measurements.
4：Experimental Procedures and Operational Workflow:
The synthesis involved co-precipitation, pyrolysis, and thiourea treatment steps, followed by characterization and electrochemical testing to evaluate OER and HER performance.
5：Data Analysis Methods:
Electrochemical measurements were performed using a workstation (AutoLab PGSTAT302N) with a three-electrode system. DFT calculations were conducted using the Vienna ab initio software package (VASP) to understand the electronic structure and charge transfer mechanisms.
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