MnWO4/生物质衍生碳纳米复合催化剂的制备及催化性能

通过共沉淀法合成了双金属氧化物MnWO₄镶嵌生物质衍生碳（MnWO₄/BC）纳米复合催化剂，并将其作为对电极（counter electrode，CE）催化剂组装了染料敏化太阳能电池（dye-sensitized solar cell，DSSC），探究了MnWO₄/BC在非碘体系中的催化性能和光伏性能。结果表明：在铜氧化还原（Cu²⁺/Cu⁺）电对DSSC中获得的光电能量转换效率（power conversion efficiency，PCE）为3.57%（D35）和1.59%（Y123），高于Pt电极的PCE（3.12%，1.16%）；50次连续循环伏安测试表明，MnWO₄/BC催化剂具有较好的电化学稳定性。

Synthesis and Electrocatalytic Properties of MnWO4/Biomass-Derived Carbon Nanocomposite Catalyst

A bimetal oxide embedded biomass-derived carbon (MnWO₄/BC) nanocomposite catalyst was synthesized using a co-precipitation approach, and it was used as a counter electrode (CE) catalyst to assemble a dye-sensitized solar cell (DSSC). The catalytic performance and photovoltaic performance of MnWO₄/BC in non-iodine system was explored. To boost the photovoltaic performance of DSSC, a novel copper redox couple (Cu²⁺/Cu⁺) and dye (D35, Y123) were adopted for replacing the traditional I^-/I₃^- redox couple and N719 dye, respectively. The resulting novel DSSC with MnWO₄/BC nanocomposite CE catalyst had a photovoltage of approximately 0.89 V. Moreover, it exhibited power conversion efficiency (PCE) of 3.57% and 1.59% for D35 and Y123 dyes, respectively, which were 14.4% and 27.0%, respectively, higher than that in the case of Pt. Fifty continuous cyclic voltammetry tests show that MnWO₄/BC catalyst has good electrochemical stability. It is observed that the catalytic activity of MnWO₄/BC enhanced significantly due to the superior conductivity and the special pore structure of BC, the excellent electrocatalytic ability of MnWO₄, and the synergistic effect between MnWO₄ and BC.