Dual-Functional Heterogeneous Rh-Sb Alloy Nanomaterials Coupling Electrochemical Hydrazine Oxidation and Hydrogen Evolution

TY - JOUR

T1 - Dual-Functional Heterogeneous Rh-Sb Alloy Nanomaterials Coupling Electrochemical Hydrazine Oxidation and Hydrogen Evolution

AU - Tian, Wenjing

AU - Huang, Hui Zi

AU - Liu, Di

AU - Zhu, Zhejiaji

AU - Zhou, Junwen

AU - Yin, An Xiang

N1 - Publisher Copyright: © 2025 American Chemical Society.

PY - 2025/3/28

Y1 - 2025/3/28

N2 - The overall hydrazine splitting (OHzS, N2H4 → N2 + 2H2) reaction, which is integrated by electrocatalytic hydrazine oxidation reaction (HzOR) and hydrogen evolution reaction (HER), provides an energy-efficient alternative to conventional overall water splitting (OWS) for sustainable hydrogen production. Herein, we present the controlled synthesis of Rh1Sb1@Rh-Sb nanoflowers (NFs) that comprise intermetallic Rh1Sb1 nanodendrite cores and ultrathin Rh-Sb random alloy nanosheet shells. The alloying of Sb enhances both HzOR and HER performances of Rh nanocatalysts through modulation of growth mechanisms, morphological evolution, and surface electronic configurations. Remarkably, a symmetrical OHzS electrolyzer employing Rh1Sb1@Rh-Sb NFs as bifunctional catalysts for both electrodes achieves the current densities of 100 and 500 mA cm-2 at cell voltages of merely 0.216 and 0.700 V (without iR compensation), respectively, corresponding to 88.1% and 71.9% reductions in electricity consumption compared to alkaline OWS systems. Furthermore, a rechargeable zinc-hydrazine (Zn-Hz) battery using Rh1Sb1@Rh-Sb NFs as the positive electrode exhibits high energy efficiency, power density, and durability. The prototype device, integrating a photovoltaic cell, a Zn-Hz battery, and an OHzS cell, demonstrates the potential for efficient and simultaneous solar energy storage, hydrazine pollutant remediation, and hydrogen generation, offering a promising avenue for practical applications.

AB - The overall hydrazine splitting (OHzS, N2H4 → N2 + 2H2) reaction, which is integrated by electrocatalytic hydrazine oxidation reaction (HzOR) and hydrogen evolution reaction (HER), provides an energy-efficient alternative to conventional overall water splitting (OWS) for sustainable hydrogen production. Herein, we present the controlled synthesis of Rh1Sb1@Rh-Sb nanoflowers (NFs) that comprise intermetallic Rh1Sb1 nanodendrite cores and ultrathin Rh-Sb random alloy nanosheet shells. The alloying of Sb enhances both HzOR and HER performances of Rh nanocatalysts through modulation of growth mechanisms, morphological evolution, and surface electronic configurations. Remarkably, a symmetrical OHzS electrolyzer employing Rh1Sb1@Rh-Sb NFs as bifunctional catalysts for both electrodes achieves the current densities of 100 and 500 mA cm-2 at cell voltages of merely 0.216 and 0.700 V (without iR compensation), respectively, corresponding to 88.1% and 71.9% reductions in electricity consumption compared to alkaline OWS systems. Furthermore, a rechargeable zinc-hydrazine (Zn-Hz) battery using Rh1Sb1@Rh-Sb NFs as the positive electrode exhibits high energy efficiency, power density, and durability. The prototype device, integrating a photovoltaic cell, a Zn-Hz battery, and an OHzS cell, demonstrates the potential for efficient and simultaneous solar energy storage, hydrazine pollutant remediation, and hydrogen generation, offering a promising avenue for practical applications.

KW - Rh−Sb alloy

KW - Zn−hydrazine battery

KW - hydrazine oxidation reaction

KW - hydrazine-assisted water splitting

KW - hydrogen evolution reaction

UR - https://www.scopus.com/pages/publications/105001492659

U2 - 10.1021/acsanm.5c00443

DO - 10.1021/acsanm.5c00443

M3 - Article

AN - SCOPUS:105001492659

SN - 2574-0970

VL - 8

SP - 6168

EP - 6178

JO - ACS Applied Nano Materials

JF - ACS Applied Nano Materials

IS - 12

ER -