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Resonance-Promoted Formic Acid Oxidation via Dynamic Electrocatalytic Modulation

Journal Article · · ACS Catalysis
 [1];  [2];  [3];  [4];  [2];  [5]
  1. Univ. of Massachusetts, Amherst, MA (United States); OSTI
  2. Univ. of Minnesota, Minneapolis, MN (United States); Univ. of Delaware, Newark, DE (United States)
  3. Univ. of Minnesota, Minneapolis, MN (United States)
  4. Univ. of Massachusetts, Amherst, MA (United States)
  5. Univ. of Massachusetts, Amherst, MA (United States); Univ. of Delaware, Newark, DE (United States)
It is a truth universally acknowledged that faster catalysts enable more efficient transformation of molecules to useful products and enhance the utilization of natural resources. However, the limit of static catalyst performance defined by the Sabatier principle has motivated a dynamic approach to catalyst design, whereby catalysts oscillate between varying energetic states. In this work, the concept of dynamic catalytic resonance was experimentally demonstrated via the electrocatalytic oxidation of formic acid over Pt. Oscillation of the electrodynamic potential between 0 and 0.8 V NHE via a square waveform at varying frequency (10–3 < f < 103 Hz) increased the turnover frequency to ~20 s–1 at 100 Hz, over one order of magnitude (20×) faster than optimal potentiostatic conditions. We attribute the accelerated dynamic catalysis to nonfaradaic formic acid dehydration to surface-bound carbon monoxide at low potentials, followed by surface oxidation and desorption to carbon dioxide at high potentials.
Research Organization:
Univ. of Delaware, Newark, DE (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
SC0001004
OSTI ID:
1801381
Journal Information:
ACS Catalysis, Journal Name: ACS Catalysis Journal Issue: 17 Vol. 10; ISSN 2155-5435
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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  • Deshlahra, Prashant; Schneider, William F.; Bernstein, Gary H.
  • Journal of the American Chemical Society, Vol. 133, Issue 41, p. 16459-16467 https://doi.org/10.1021/ja2020789
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