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Title: Electrocatalytic Hydrogenation of Phenol over Platinum and Rhodium: Unexpected Temperature Effects Resolved

Abstract

Both electrocatalytic hydrogenation (ECH) and thermal catalytic hydrogenation (TCH) of phenol by Pt and Rh show a roll-over in rate with increasing temperature without changing the principal reaction pathways. The negative effect of tempera-ture for aqueous-phase phenol TCH and ECH on Pt and Rh is deduced to be from dehydrogenated phenol adsorbates, which block active sites. ECH and TCH rates increase similarly with increasing hydrogen chemical potential whether in-duced by applied potential or H2 pressure, both via increasing H coverage, and indirectly by removing site blockers, a strong effect at high temperature. This enables unprecedented phenol TCH rates at 60-100 °C.

Authors:
 [1];  [2];  [2];  [3];  [4];  [5]
+ Show Author Affiliations
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Univ. of Washington, Seattle, WA (United States)
  2. Technische Univ. Munchen, Garching (Germany)
  3. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  4. Univ. of Washington, Seattle, WA (United States)
  5. Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Technische Univ. Munchen, Garching (Germany)
Publication Date:
Research Org.:
Univ. of Washington, Seattle, WA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1597974
Grant/Contract Number:  
FG02-96ER14630
Resource Type:
Accepted Manuscript
Journal Name:
ACS Catalysis
Additional Journal Information:
Journal Volume: 6; Journal Issue: 11; Journal ID: ISSN 2155-5435
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; hydrogenation; electrocatalysis; poisoning; phenol; platinum; rhodium

Citation Formats

Singh, Nirala, Song, Yang, Gutiérrez, Oliver Y., Camaioni, Donald M., Campbell, Charles T., and Lercher, Johannes A. Electrocatalytic Hydrogenation of Phenol over Platinum and Rhodium: Unexpected Temperature Effects Resolved. United States: N. p., 2016. Web. doi:10.1021/acscatal.6b02296.
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Singh, Nirala, Song, Yang, Gutiérrez, Oliver Y., Camaioni, Donald M., Campbell, Charles T., & Lercher, Johannes A. Electrocatalytic Hydrogenation of Phenol over Platinum and Rhodium: Unexpected Temperature Effects Resolved. United States. https://doi.org/10.1021/acscatal.6b02296
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Singh, Nirala, Song, Yang, Gutiérrez, Oliver Y., Camaioni, Donald M., Campbell, Charles T., and Lercher, Johannes A. Tue . "Electrocatalytic Hydrogenation of Phenol over Platinum and Rhodium: Unexpected Temperature Effects Resolved". United States. https://doi.org/10.1021/acscatal.6b02296. https://www.osti.gov/servlets/purl/1597974.
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@article{osti_1597974,
title = {Electrocatalytic Hydrogenation of Phenol over Platinum and Rhodium: Unexpected Temperature Effects Resolved},
author = {Singh, Nirala and Song, Yang and Gutiérrez, Oliver Y. and Camaioni, Donald M. and Campbell, Charles T. and Lercher, Johannes A.},
abstractNote = {Both electrocatalytic hydrogenation (ECH) and thermal catalytic hydrogenation (TCH) of phenol by Pt and Rh show a roll-over in rate with increasing temperature without changing the principal reaction pathways. The negative effect of tempera-ture for aqueous-phase phenol TCH and ECH on Pt and Rh is deduced to be from dehydrogenated phenol adsorbates, which block active sites. ECH and TCH rates increase similarly with increasing hydrogen chemical potential whether in-duced by applied potential or H2 pressure, both via increasing H coverage, and indirectly by removing site blockers, a strong effect at high temperature. This enables unprecedented phenol TCH rates at 60-100 °C.},
doi = {10.1021/acscatal.6b02296},
journal = {ACS Catalysis},
number = 11,
volume = 6,
place = {United States},
year = {Tue Oct 04 00:00:00 EDT 2016},
month = {Tue Oct 04 00:00:00 EDT 2016}
}
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Journal Article:
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Publisher's Version of Record
https://doi.org/10.1021/acscatal.6b02296
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Works referenced in this record:

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    Electrocatalytic Upgrading of Lignin‐Derived Bio‐Oil Based on Surface‐Engineered PtNiB Nanostructure
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