Transient Temperature Response of Supported Rh Nanoparticles in Photothermal Dry Reforming of Methane─An Operando Dispersive X-ray Absorption Spectroscopy Study
Transient Temperature Response of Supported Rh Nanoparticles in Photothermal Dry Reforming of Methane─An Operando Dispersive X-ray Absorption Spectroscopy Study
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DOI：
10.1021/acs.jpcc.2c05291
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发表时间：
2022-09
期刊：
影响因子：
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通讯作者：
Daichi Takami;A. Yamamoto;Kazuo Kato;T. Shishido;H. Yoshida
中科院分区：
文献类型：
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作者：
Daichi Takami;A. Yamamoto;Kazuo Kato;T. Shishido;H. Yoshida
光热催化转化CO2是太阳能储存和CO2利用的有效策略。金属纳米粒子的选择性加热为CO2转化提供了高温反应场，然而光热反应条件下纳米尺度的温度尚未被揭示。在这项研究中，我们performedoperandodosperic X射线吸收光谱（DXAS）在集中的可见光和近红外光下，以评估在光热干重整甲烷的催化活性位点的Rh纳米粒子在Al 2 O3（局部温度）的温度。的毫秒级DXAS测量表明，在局部温度的Rh纳米粒子的瞬态变化的表面含碳中间体的形成过程的影响。分析方法使用operandototime-resolved DXAS打开光照射下的纳米级温度评估，包括阳光。
Photothermal catalytic conversion of CO2is an effective strategy for solar energy storage and CO2utilization. The selective heating of metal nanoparticles (NPs) endows the high-temperature reaction field for CO2conversion; however, temperatures at the nanoscale under photothermal reaction conditions remain unrevealed. In this study, we performedoperandodispersive X-ray absorption spectroscopy (DXAS) under concentrated visible and near-infrared light to evaluate the temperature of the catalytic active sites of Rh NPs on Al2O3(local temperature) in the photothermal dry reforming of methane. The millisecond-order DXAS measurements demonstrated that the transient change in the local temperature of Rh NPs was affected by the formation process of the surface carbon-containing intermediates. The analysis methodology usingoperandotime-resolved DXAS opens temperature evaluation at the nanoscale under light irradiation, including sunlight.