The role of copper in the synthesis of platinum based catalysts and in their efficiency for the hydrogen evolution reaction

Mihai, Geanina (avtor), Anicai, Liana (avtor), Enache, Laura-Bianca (avtor), Lazar, Oana (avtor), Enachescu, Marius (avtor), Genorio, Boštjan (avtor), Dimiev, Ayrat M. (avtor)

In this work, we synthesized two hybrid copper–platinum composites and two mono-metallic control samples on the carbon black (CB) support with the use of the polyol-formaldehyde method. The bi-metallic composites were prepared by the two different experimental protocols: consecutive deposition of the two metals CB/CuPt-1 and co-deposition of CB/CuPt-2. With both methods, the use of copper facilitates deposition of platinum, leading to a higher platinum content in the products, compared to the mono-metallic CB/Pt control sample. SEM and HRTEM images show that, in monometallic CB/Cu, copper does not form any nanoparticles, being atomically dispersed on the CB surface. The other three samples have uniformly dispersed nanoparticles with a size of 2–4 nm, densely covering the CB support. XRD and XPS data suggest that copper facilitates more efficient reduction of platinum, and is incorporated into the nanoparticles. Next, all the synthesized composites were tested for the hydrogen evolution reaction (HER). The two bi-metallic composites outperform not only the mono-metallic CB/Pt sample, but also the commercial catalyst with a similar or an even higher platinum content. Interestingly, the catalytic efficiency is not directly related to the platinum content in the tested materials. As a result, CB/CuPt-2, which has a lower Pt content, demonstrates greater efficiency in certain parameters compared to CB/PtCu-1, which contains a higher Pt content. This observation suggests that incorporation of copper into the structure of the composite materials leads to synergistic effects. Our results show the role of copper in the efficiency of the platinum catalysts for the HER and open routes for increasing the efficiency of the hydrogen generation reaction on an industrial scale.

• Jezik: Angleški jezik
• Ključne besede: Pt-Cu-electrocatalyst, hydrogen evolution reaction, reduced graphene oxide, electrocatalysis
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FKKT - Fakulteta za kemijo in kemijsko tehnologijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2025
• Št. strani: Str. 7459-7468
• Številčenje: Vol. 49, iss. 18
• PID: 20.500.12556/RUL-171250
• UDK: 621.35:621.96
• ISSN pri članku: 1369-9261
• DOI: 10.1039/D5NJ00667H
• COBISS.SI-ID: 233098243
• Datum objave v RUL: 21.08.2025

Gradivo je del revije

• Naslov: New journal of chemistry
• Skrajšan naslov: New j. chem.
• Založnik: Royal Society of Chemistry
• ISSN: 1369-9261
• COBISS.SI-ID: 22573573

Licence

• Licenca: CC BY-NC 3.0, Creative Commons Priznanje avtorstva-Nekomercialno 3.0 Nedoločena
• Povezava: https://creativecommons.org/licenses/by-nc/3.0/deed.sl
• Opis: Dovoljuje kopiranje in razširjanje vsebin v kakršnemkoli mediju in obliki. Dovoljuje remixanje, urejanje, predelava in vključevanje vsebine v lastna dela. Primerno morate navesti avtorja, povezavo do licence in označiti spremembe, če so kakšne nastale. To lahko storite na kakršenkoli razumen način, vendar ne na način, ki bi namigoval na to, da dajalec licence podpira vas ali vašo uporabo dela. Te vsebine ne smete uporabiti v komercialne namene. Ne smete uporabiti pravnih določil ali tehničnih ukrepov, ki bi pravno omejili ali onemogočilo druge, da bi storili karkoli, kar licenca dovoli.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: Pt-Cu-elektrokatalizator, reakcija razvijanja vodika, reduciran grafen oksid, elektrokataliza

Projekti

• Financer: EC - European Commission
• Številka projekta: N. 760087
• Naslov: Romania’s National Recovery and Resilience Plan PNRR/2022/C9/MCID/I8