【摘要】：高催化活性、低成本、良好工藝兼容性以及高穩(wěn)定性的析氫催化劑是實(shí)現(xiàn)一體化光電化學(xué)水解制氫器件的關(guān)鍵,然而傳統(tǒng)的貴金屬催化劑由于儲量稀缺、成本高昂而嚴(yán)重限制了光電化學(xué)水解制氫器件的產(chǎn)業(yè)化進(jìn)程.本文在室溫下通過濕法化學(xué)合成法制備了高催化活性、成本低廉以及工藝兼容性好的非金屬非晶三硫化鉬析氫催化劑,并研究了不同催化劑滴涂量對其催化活性以及串聯(lián)制氫器件制氫性能的影響.結(jié)果表明,存在最優(yōu)化非晶三硫化鉬催化劑滴涂量以獲得最佳催化活性(10 m A/cm~2電流密度對應(yīng)電勢達(dá)260 mV vs.RHE(可逆氫電極),塔菲爾斜率達(dá)68 mV/dec),其粗糙表面以及多孔結(jié)構(gòu)可獲得更大的電化學(xué)接觸面積以促進(jìn)析氫反應(yīng).進(jìn)一步將其作為光陰極應(yīng)用于串聯(lián)制氫器件,可有效降低過電勢損失和提高光生電流密度輸出,與光陽極結(jié)合有望提高制氫效率.
[Abstract]:High catalytic activity, low cost, good process compatibility and high stability of hydrogen evolution catalysts are the key to the realization of integrated photochemical hydrolysis hydrogen production devices. However, the traditional precious metal catalysts have limited the industrialization process of photochemical hydrolysis hydrogen production devices because of their scarce reserves and high cost. In this paper, non-metallic amorphous Mo trisulfide hydrogen evolution catalysts with high catalytic activity, low cost and good process compatibility were prepared by wet chemical synthesis at room temperature. The effects of different catalyst droplets on their catalytic activity and hydrogen production performance of series hydrogen production devices were studied. The results show that there is an optimal amount of amorphous Mo trisulfide catalyst to obtain the optimum catalytic activity (the corresponding potential of 10 m A/cm~2 current density is 260 mV vs.RHE (reversible hydrogen electrode) and the Tafel slope is 68 mV/dec). The rough surface and porous structure of the catalyst can obtain larger electrochemical contact area to promote hydrogen evolution reaction. Furthermore, its application as photocathode in series hydrogen production devices can effectively reduce the loss of overpotential and increase the output of photogenerated current density. the combination of photocathode and photoanode is expected to improve the efficiency of hydrogen production.
【作者單位】： 河北工業(yè)大學(xué)材料科學(xué)與工程學(xué)院;南開大學(xué)光電子薄膜器件與技術(shù)研究所光電子薄膜器件與技術(shù)天津市重點(diǎn)實(shí)驗(yàn)室光電信息技術(shù)科學(xué)教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：科技部國際合作項(xiàng)目(批準(zhǔn)號:2014DFE60170) 高等學(xué)校博士學(xué)科點(diǎn)專項(xiàng)科研基金(批準(zhǔn)號:20120031110039)資助的課題~~
【分類號】：O643.36

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