Aktif Karbon-Nikel Sülfür-Borofen Bazlı Elektrokatalizör Geliştirilmesi ve Hidrojen Evrim Reaksiyonu Performansının İncelenmesi

Yıl 2025, ERKEN GÖRÜNÜM, 1 - 1

Bilge Aslan Tanrıverdi , Büşranur Duman Sıncak , Mert Yekta Doğan , Hacı Mehmet Taşdemir , Dilşad Dolunay Eslek Koyuncu , Alpay Şahin

https://doi.org/10.2339/politeknik.1727705

Öz

Sürdürülebilir kalkınma hedeflerine ulaşmada stratejik bir rol üstlenen hidrojen teknolojisi, sera gazı emisyonlarının azaltılmasına yönelik önemli bir düşük karbon seçeneği sunmaktadır. Özellikle yeşil hidrojen, net sıfır emisyon hedeflerine yönelik geçiş sürecinde kilit bir rol üstlenmektedir. Bu çalışmada, aktif karbon destekli elektrot yüzeyine nikel sülfür ve borofen malzemeleri yüklenerek elektrokatalizörler sentezlenmiş ve hidrojen oluşum reaksiyonu (HER) için elektrokimyasal performansları karşılaştırmalı olarak incelenmiştir. Aktif karbonun XRD deseni, grafitik tabakaların varlığını ve malzemenin amorf karakterini ortaya koymuştur. Ortalama gözenek çapı ise yaklaşık 1,44 nm olup, gözenek dağılımının büyük ölçüde mikrogözenek bölgesinde yoğunlaştığı belirlenmiştir. Hidrotermal yöntemle sentezlenen NiS’in XRD deseninde gözlenen karakteristik pikler ise Millerite (NiS) fazına karşılık gelmektedir. Pul pul dökülme yöntemiyle sentezlenen borofen için elde edilen XRD kırınım piklerinin çoğu β-rhombohedral bor ile uyumludur. Sentezlenen elektrokatalizörler arasında borofen katkılı nikel sülfür elektrokatalizörü (80AC18NiS2B), 10 mA.cm⁻² de 421 mV aşırı potansiyel, stabilite testi sonrası %43,47 akım artışı ve belirgin elektro¬kimyasal aktivasyon ile iyileşmiş HER kinetiğini göstermiştir. Bu çalışma, aktif karbon destekli nikel sülfür ve borofen katkılı elektrokatalizörünün, sürdürülebilir hidrojen üretimi için etkin ve uzun ömürlü alternatifler sunabileceğini göstermektedir.

Anahtar Kelimeler

Aktif karbon , nikel sülfür , borofen , elektrokatalizör , hidrojen üretimi

Development of Activated Carbon-Nickel Sulfide-Borophene Based Electrocatalyst and Investigation of Hydrogen Evolution Reaction Performance

Öz

Hydrogen technology, which plays a strategic role in achieving sustainable development goals, offers an important low-carbon option for reducing greenhouse gas emissions. Green hydrogen, in particular, plays a key role in the transition to net-zero emissions targets. In this study, electrocatalysts were synthesized by loading nickel sulfide and borophene materials onto an activated carbon-supported electrode surface, and their electrochemical performances for the hydrogen evolution reaction (HER) were comparatively investigated. The XRD pattern of activated carbon revealed the presence of graphitic layers and the amorphous character of the material. The average pore diameter is approximately 1.44 nm, and it has been determined that the pore distribution is largely concentrated in the micropore region. The characteristic peaks observed in the XRD pattern of NiS synthesized by the hydrothermal method correspond to the Millerite (NiS) phase. Most of the XRD diffraction peaks obtained for borophene synthesized by the flaking method are consistent with β-rhombohedral boron. Among the synthesized electrocatalysts, the borophen-doped nickel sulfide electrocatalyst (80AC18NiS2B) exhibited an overpotential of 421 mV at 10 mA.cm⁻², 43.47% current increase after the stability test, and improved HER kinetics with significant electrochemical activation. This study demonstrates that nickel sulfide and borophene supported on activated carbon electrocatalysts can offer effective and long-lasting alternatives for sustainable hydrogen production.

Anahtar Kelimeler

Activated carbon , nickel sulfide , borophene , electrocatalyst , hydrogen production

Kaynakça

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