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首页> 外文期刊>Electrocatalysis >Oxide Substrate Effect Toward Electrocatalytic Enhancement of Platinum and Ruthenium–Selenium Catalysts
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Oxide Substrate Effect Toward Electrocatalytic Enhancement of Platinum and Ruthenium–Selenium Catalysts

机译：氧化物对电催化增强铂和钌-硒催化剂的作用

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Titanium dioxide (anatase) and carbon composites were produced. The oxide was synthesized via the sol–gel technique in a carbon matrix. A chemical interaction was revealed by thermal differential analysis since the carbon decomposition temperature shifts in the presence of the oxide. Oxide–carbon composites were used as support for nanodivided platinum and ruthenium–selenide catalyst. The nanoparticles were selectively deposited onto the oxide by means of electron–hole pairs generated on the oxide sites under UV irradiation. A systematic study for Pt was performed as a function of the loading using the oxide–carbon composite substrate and carbon toward the oxygen reduction reaction. A specific activity (mA/cm2 Pt) enhancement of 30% to 40%, at 0.9 V per reversible hydrogen electrode, with respect to carbon-supported samples, was obtained. This effect was also observed on the Ru–Se system and can be attributed to a catalyst–substrate effect.
机译：生产了二氧化钛（锐钛矿）和碳复合材料。该氧化物是通过溶胶-凝胶技术在碳基质中合成的。通过热差分析揭示了化学相互作用，因为碳的分解温度在氧化物的存在下移动。氧化物-碳复合材料用作纳米级铂和硒化硒化物催化剂的载体。通过在紫外线照射下在氧化物位点上产生的电子-空穴对，将纳米粒子选择性地沉积在氧化物上。使用氧化物-碳复合材料基材和碳进行氧还原反应，对Pt进行了根据负载量的系统研究。相对于碳载样品，在每个可逆氢电极0.9 V时，比活度（mA / cm2 Pt ）提高了30％至40％。在Ru-Se系统上也观察到了这种效应，并且可以归因于催化剂-底物效应。

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