首页|Hybridization of Mn/Ta bimetallic oxide and mesh-like porous bio-carbon for boosting copper reduction for D35/Y123-sensitized solar cells and hydrogen evolution

Hybridization of Mn/Ta bimetallic oxide and mesh-like porous bio-carbon for boosting copper reduction for D35/Y123-sensitized solar cells and hydrogen evolution

扫码查看
原文链接
  • NSTL
  • Elsevier
Developing high-performance and low-cost catalysts for replacing Pt-based catalysts is a significant challenge for solar cells and water splitting applications. In this work, a bifunctional hybrid catalyst of MnTa2O6@MPC (MPC: mesh-like bio-based porous carbon) was synthesized, using a co-precipitation approach. Benefiting from the high specific surface area (332.743 m(2) g(-1)), integrating the merits of the electrical conductivity of MPC, the outstanding electrocatalytic ability of MnTa2O6, and the synergistic effect between MnTa2O6 and MPC, the catalytic activity of MnTa2O6@MPC was significantly enhanced. To boost the photovoltaic performance of dye-sensitized solar cells, a novel Cu2+/Cu+ redox mediator and dye (Y123, D35) were adopted for replacing the traditional I-3(-)/I- redox mediator and N719 dye, respectively. The resulting advanced solar cell with the Cu2+/Cu+ redox mediator based on the MnTa2O6@MPC counter electrode catalyst exhibited a photovoltage of similar to 0.88 V, and cell efficiencies of 3.41% and 1.92% for the D35 and Y123 dye systems, respectively, which are respectively 16% and 8% higher than that of Pt. MnTa2O6@MPC also exhibited significant catalytic ability for hydrogen production, yielding a small overpotential of 141.9 mV at a current density of 10 mA cm(-2) and a small Tafel slope of 105.0 mV dec(-1) in an alkaline medium. This work provides promising guidance for designing bifunctional hybrid electrocatalysts for high-performance new energy devices. (C) 2021 Elsevier B.V. All rights reserved.

dye-sensitized solar cellcopper redox mediatorD35/Y123 dyehydrogen evolution reactioncounter electrodecatalystsEFFICIENT COUNTER ELECTRODENITROGEN ACTIVE-SITESREDOX MEDIATORSTRIIODIDE REDUCTIONELECTROCHEMICAL PROPERTIESELECTROCATALYTIC ACTIVITYCATALYTIC-PROPERTIESGRAPHENE OXIDEDOPED CARBONPERFORMANCE

Zhang, Yongwei、Yun, Sining、Qiao, Xinying、Sun, Menglong、Dang, Jiaoe、Dang, Changwei、Yang, Jingjing

展开 >

Xian Univ Architecture & Technol

2022

10.1016/j.jallcom.2021.162349

Journal of Alloys and Compounds

Journal of Alloys and Compounds

EISCI
ISSN：0925-8388
年,卷(期)：2022.893
  • 9
  • 103