Temperature dependence of aqueous-phase phenol adsorption on Pt and Rh
Temperature dependence of aqueous-phase phenol adsorption on Pt and Rh
复制标题
Pt 和 Rh 上水相苯酚吸附的温度依赖性
DOI:
10.1007/s10800-020-01503-3
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发表时间:
2021
影响因子:
2.9
通讯作者:
Singh, Nirala
中科院分区:
文献类型:
--
作者:
Akinola, James;Singh, Nirala
AbstractCondensed/aqueous phase surface reactions such as electrocatalytic hydrogenation of bio-oil often involve reactant adsorption and displacement of adsorbed solvent molecules. The enthalpy and entropy of these adsorption processes will influence the kinetics of surface reactions in the condensed/aqueous phase. The value of the adsorption entropy will have a significant effect on how the reactant coverages vary as a function of temperature. Here, adsorption isotherms from 10 to 40 °C and van’t Hoff plots were constructed to directly extract the adsorption entropy and enthalpy of phenol, a bio-oil model compound, on Pt and Rh in aqueous media. We show that the effective adsorption entropy of phenol on Pt and Rh in aqueous phase is positive, in contrast to the negative entropy expected in gas phase. The positive entropy values in the aqueous phase are consistent with adsorbed water gaining a fraction of the entropy of bulk liquid water upon displacement by adsorbed phenol. Consequently, the phenol surface coverage is less dependent on temperature in the aqueous phase compared to the gas phase. The results here give insight to the way in which temperature impacts reaction rates for aqueous-phase phenol hydrogenation reaction.Graphic abstract
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影响因子:
3.7
作者:
S. Carey;Wei Zhao;Zhongtian Mao;C. Campbell
通讯作者:
S. Carey;Wei Zhao;Zhongtian Mao;C. Campbell
DOI:
--
发表时间:
2020
期刊:
影响因子:
--
作者:
Elizabeth J. Biddinger;M. Modestino
通讯作者:
M. Modestino
影响因子:
3.9
作者:
A. Zolfaghari;M. Chayer;G. Jerkiewicz
通讯作者:
G. Jerkiewicz
DOI:
--
发表时间:
1978
期刊:
影响因子:
--
作者:
S. A. Kudchadker;A. P. Kudchadker;R. Wilhoit;B. Zwolinski
通讯作者:
B. Zwolinski
DOI:
--
发表时间:
1981
期刊:
影响因子:
--
作者:
A. Wiȩckowski;Jerzy Sobrowski;P. Zelenay;K. Franaszczuk
通讯作者:
K. Franaszczuk