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Devianto, Hary
Department of Chemical Engineering, Faculty of Industrial Technology, Institut Teknologi Bandung, Jalan Ganesa No. 10, Bandung 40132
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Social Sciences Other

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Journal : International Journal of Renewable Energy Development

 1 
Performance Evaluation of An Electrolyte-Supported Intermediate-Temperature Solid Oxide Fuel Cell (IT-SOFC) with Low-Cost Materials Fauzi Yusupandi; Hary Devianto; Pramujo Widiatmoko; Isdiriayani Nurdin; Sung Pil Yoon; Tae-Hoon Lim; Aditya Farhan Arif
International Journal of Renewable Energy Development Vol 11, No 4 (2022): November 2022
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2022.46735

Abstract

Intermediate temperature solid oxide fuel cell (IT-SOFC) provides economic and technical advantages over the conventional SOFC because of the wider material use, lower fabrication cost and longer lifetime of the cell components. In this work, we fabricated electrolyte-supported IT-SOFC using low-cost materials such as calcia-stabilized zirconia (CSZ) electrolyte fabricated by dry-pressing, NiO-CSZ anode and Ca3Co1.9Zn0.1O6 (CCZO) cathode produced through brush coating technique. According to the XRD result, the monoclinic phase dominated over the cubic phase, and the relative density of the electrolyte was low but the hardness of the CSZ electrolyte was close to the hardness of commercial 8YSZ electrolyte. The performance of the single cell was performed with hydrogen ambient air. An open-circuit voltage (OCV) of 0.43, 0.46, and 0.45 V and a maximum power density of 0.14, 0.50, and 1.00 mW/cm2 were achieved at the operating temperature of 600, 700, and 800 °C, respectively. The ohmic resistance of the cell at 700 and 800 °C achieved 81.5 and 33.00 Ω, respectively due to the contribution of thick electrolyte and Cr poisoning in electrodes and electrolyte
Synthesis of rubber seed shell-derived porous activated carbons for promising supercapacitor application Rustamaji, Heri; Prakoso, Tirto; Devianto, Hary; Widiatmoko, Pramujo; Febriyanto, Pramahadi; Ginting, Simparmin br; Darmansyah, Darmansyah
International Journal of Renewable Energy Development Vol 14, No 2 (2025): March 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.60869

Abstract

This work investigates synthesizing activated carbon obtained from rubber seed shells utilizing several activating agents (KOH, CaCl2, and ZnCl2) for supercapacitor applications. Activated carbon was produced from a rubber seed shell using hydrothermal carbonization at 275 °C for 60 minutes and a 120-minute activation treatment at 800 °C. Various activating agents pronounced impacted the pore architecture, surface area, crystallinity, and level of graphitization, which collectively determined the electrochemical characteristics of the resulting materials. Incorporating activation agents enhances the specific surface area and influences the extent of graphitization of activated carbon. The specific surface area of activated carbon products ranges from 367 to 735.2 m² g⁻¹. Further investigation through electrochemical analysis, conducted with a carefully engineered two-electrode system, demonstrated a peak electrode capacitance value of 246 F g-1 at 50 mA g-1 for an ACZn-based supercapacitor. Supercapacitor cells’ energy and power densities reached significant levels, measuring 5.47 Wh kg-1 and 246 W kg-1, respectively. The RSS-derived activated carbon-based supercapacitor exhibited remarkable longevity in a 5000-cycle test, with consistent capacitance retention and coulombic efficiency of 100.11% and 100%, respectively. This work presents a sustainable pathway for producing activated carbon electrodes, contributing to the global circular economy and demonstrating considerable industrial potential.
Morphological and thermal stability analysis of Sn/C electrodes synthesized through impregnation and precipitation methods for CO2 electroreduction Eviani, Mitra; Prakoso, Tirto; Kusdiana, Dadan; Widiatmoko, Pramujo; Devianto, Hary
International Journal of Renewable Energy Development Vol 14, No 5 (2025): September 2025
Publisher : Center of Biomass & Renewable Energy (CBIORE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/ijred.2025.61280

Abstract

This study investigates tin (Sn) based electrodes supported by graphite for the electrochemical reduction of carbon dioxide (ECO2R) to formic acid, comparing precipitation and impregnation synthesis methods. Electrodes were characterized using Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS), Thermogravimetric Analysis (TGA), Cyclic Voltammetry (CV), Chronoamperometry, and Electrochemical Impedance Spectroscopy (EIS). The precipitation method yielded higher Sn content (91.22%) and superior thermal stability (3% mass loss at 1000°C vs. 45% for impregnation). Morphological analysis through SEM revealed precipitation-synthesized electrodes exhibited more uniform Sn particle distribution across the graphite surface, while impregnation resulted in larger Sn agglomerates with less homogeneous coverage, significantly influencing electroactive surface area and catalytic performance. The electrochemical performance of electrodes was tested using H-cell. CV showed decreased cathodic current for Sn/C electrodes compared to pure graphite in CO2-saturated electrolyte, while chronoamperometry indicated slightly better sustained performance for precipitation-synthesized electrodes with stabilized current densities after 3 hours of operation. EIS analysis suggested the precipitation method yields a marginally lower ohmic resistance (28.8 Ω vs. 29.8 Ω), resulting in a more favorable electrode structure for overall catalytic activity. Both methods showed lower ohmic resistance than that of pure graphite (38.1 Ω), the precipitation-synthesized Sn/C electrode emerged as the preferred selection for ECO2R to formic acid, balancing high Sn content, thermal stability, superior durability, and better Faradaic efficiency. The observed performance differences were attributed to distinct metal-support interactions formed during synthesis, with precipitation creating stronger metal-carbon bonds that enhance stability but potentially limit certain active sites necessary for optimal CO2 reduction kinetics. This comprehensive characterization revealed that the precipitation-synthesized electrode offers the most promising foundation for further development, potentially through process optimization, hybrid synthesis approaches, or targeted doping strategies to enhance catalytic activity while maintaining the advantageous stability characteristics.
Co-Authors Aditya Farhan Arif Adriaan Adriaan Adriaan Adriaan Adriaan, Adriaan Aghietyas Choirun Az Zahra Aida Nur Ramadhani Al-Aziz, Rd. Habib R. M. T. Ananda, Wisnu Anastasia Yuandy Anies Mutiari Anna Sonya Asoka Ardiyan Harimawan Ardiyan Harimawan Aslan, Christian Auliardi, Dzaky Bork Ilsemann Dadan Kusdiana Daniel Yonathan, Daniel DARMANSYAH . Dian Shofinita Dicky Tri Jatmiko Eviani, Mitra Fauzi Yusupandi Febriyanto, Pramahadi Ferdyan Ihza Akbar Fitri, Hera Rahma Gatalie, Kreszen Livianus Guan, Guoqing Harimawan, Ardiyan Henry Natanail Purwito Heri Rustamaji Hilham Zamriko Koto Ignatius Chandra Kurniawan Ilsemann, Bork Isdiriayani Nurdin Isdiriayani Nurdin Isdiriayani Nurdin Isdiriayani Nurdin Isdiriayani Nurdin Isdiriayani Nurdin Isdiriayani Nurdin Isdiriayani Nurdin Isdiriayani Nurdin Isdiriayani Nurdin James B. Winterburn Jerry Jerry Josephine Christine Utomo Khodiyat, Nicholas Koto, Hilham Zamriko Listiani Artha Melanie, Susiana Mhd Ridho Utomo Mike Reich Mitra Eviani Muhammad Mara Ikhsan Mutiari, Anies Nurdin, Isdiriayani Nurdin, Isdiriayani Pramahadi Febriyanto Pramujo Widiatmoko Pramujo Widiatmoko Pramujo Widiatmoko Pramujo Widiatmoko Pramujo Widiatmoko Pramujo Widiatmoko Pramujo Widiatmoko Pramujo Widiatmoko Pramujo Widiatmoko Pusparizkita, Yustina Metanoia Rd. Habib R. M. T. Al-Aziz Reich, Mike Rendy Rendy Ridho Eka Yandra Rizkiana, Jenny Rizky Eka Ahmad Saputera, Wibawa Hendra Satria, Arysca Wisnu Schmahl, Wolfgang Setiadi, Tjandra Shofinita, Dian Simparmin br Ginting Sukmana, Ira Febrianty Sung Pil Yoon Susiana Melanie Tae-Hoon Lim Tatang Hernas Soerawidjaja Tatto Bustomi Thadeo, Francesco Tiara Calista Shandy Tirto Prakoso Tirto Prakoso Utomo, Mhd Ridho Vita Wonoputri Widiatmoko, Pramujo Winterburn, James B. Wisnu Ananda Wolfgang Schmahl Yandra, Ridho Eka Yustina Metanoia Pusparizkita Yusupandi, Fauzi