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Title: Underlying Substrate Effect on Electrochemical Activity for Hydrogen Evolution Reaction with Low-Platinum-Loaded Catalysts

Journal Article · · Small Structures
 [1];  [2];  [3];  [4];  [5];  [4];  [6];  [7];  [8]; ORCiD logo [1]
  1. Department of Mathematics Computer Science and Engineering Technology Elizabeth City State University Elizabeth NC 27909 USA
  2. Physical Sciences Division Physical & Computational Sciences Directorate Pacific Northwest National Laboratory Richland WA 99352 USA
  3. Center for Advanced Materials Qatar University Doha 2713 Qatar
  4. Department of Electrical and Computer Engineering Old Dominion University Norfolk VA 23529 USA
  5. Department of Electrical and Computer Engineering Boise State University Boise ID 83725 USA
  6. Department of Natural Sciences Elizabeth City State University Elizabeth NC 27909 USA
  7. Center for Research Excellence in Science and Technology (CREST), Department of Mathematics and Physics North Carolina Central University Durham NC 27707 USA
  8. Conn Center for Renewable Energy Research University of Louisville Louisville KY 40292 USA

Platinum is known as the best catalyst for the hydrogen evolution reaction (HER) but the scarcity and high cost of Pt limit its widespread applicability. Herein, the role of the underlying substrate on the HER activity of dispersed Pt atoms is uncovered. A direct current magnetron sputtering technique is utilized to deposit transition metal (TM) thin films of W, Ti, and Ta as underlying substrates for extremely low loading of Pt (<1.5 at%). The electrocatalytic performance of as-synthesized samples for the HER is examined in both alkali and acidic media. The results show that despite the low loading of Pt, the Pt/TM catalysts produce hydrogen at a rate comparable to that of pristine bulk Pt. Pt/TM catalysts also display good stability with less than 5% decay in performance after 10 h of continuous HER operation. Based on the computational study, the excellent performance is attributed to the modified electronic properties of the Pt atoms, offering ideal binding energy for HER due to interaction with the underlying substrates. This work provides a robust and industry-friendly route toward designing efficient catalytic systems for important electrochemical reactions such as HER and others.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); North Carolina Central Univ., Durham, NC (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
AC05-76RL01830; NA0003979; NA0004007; SC0023427; AC02-05CH11231
OSTI ID:
2204725
Alternate ID(s):
OSTI ID: 2212455; OSTI ID: 2282168; OSTI ID: 2376135
Report Number(s):
PNNL-SA-188257
Journal Information:
Small Structures, Vol. 5, Issue 2; ISSN 2688-4062
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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