Sunlight-Assisted Hydrogen Evolution on a 3D-Printed LCNO-Derived Multiphase La–Cu–Ni–O Ceramic Electrode
Energy Technology, cilt.14, sa.9, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 14 Sayı: 9
- Basım Tarihi: 2026
- Doi Numarası: 10.1002/ente.70655
- Dergi Adı: Energy Technology
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Applied Science & Technology Source, Chimica, Compendex, Environment Index, Greenfile, INSPEC, Natural Science Collection (ProQuest), Earth, Atmospheric, & Aquatic Science Collection (ProQuest)
- Anahtar Kelimeler: electrocatalyst, electrochemical performance, hydrogen evolution reaction (HER), multiphase La–Cu–Ni–O oxides
- Çukurova Üniversitesi Adresli: Evet
Özet
This study reports the fabrication of a three-dimensional (3D) LCNO-derived multiphase La–Cu–Ni–O ceramic electrode using polylactic acid-supported fused granular fabrication followed by sintering. X-ray diffraction and reference intensity ratio (RIR)-based phase analysis showed that the electrode comprised copper nickel lanthanum oxide, lanthanum nickel oxide, lanthanum copper oxide, and metallic Ni phases rather than phase-pure La2CuNiO6 double perovskite. Complementary analyses confirmed the formation of a multiphase ceramic system and retention of its interconnected porous 3D architecture after thermal processing. The hydrogen evolution reaction performance of the sintered electrode (Sin-LCNO) was evaluated under dark and sunlight conditions using linear sweep voltammetry, polarization, cyclic voltammetry, and electrochemical impedance spectroscopy. Illumination produced a current-density-dependent response, with a higher overpotential at 1 mA cm−2 but a lower overpotential at 10 mA cm−2. The charge–transfer resistance decreased from 870.4 Ω cm2 in darkness to 728.10 Ω cm2 under sunlight, indicating facilitated interfacial charge transfer. Mott–Schottky analysis indicated n-type semiconductor behavior, a flat-band potential of −1.13 V, and a donor density of 8.8 × 1018 cm−3. The electrode exhibited a sustained photocurrent response over 10 000 s and achieved an applied-bias photon-to-current efficiency of 0.146% under 1-sun illumination. Overall, its performance reflects the combined contributions of the multiphase oxide matrix and metallic Ni.