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Properties of Platinum Sub-Nanoclusters on Graphene Nano Sheets at Cathode Siburian, Rikson; Bukit, Minsyahril
Jurnal Matematika dan Sains Vol 19 No 1 (2014)
Publisher : Institut Teknologi Bandung

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The catalytic activities of Pt subnano-clusters on graphene nanosheets (GNS) for oxygen reduction reaction (ORR) catalysts have been examined. The ORR activity of Pt on GNS (0.99 V) is higher than on carbon black (CB) commercial catalyst (0.94 V versus RHE). A core level shift of Pt 4f in XPS indicates that Pt is chemically interacted with GNS. It has been ascribed to difference in the interface interaction between Pt and graphene via different strength of the π–d hybridization. Keywords: Pt, Graphene nanosheet, Pt subnano-clusters, ORR. Sifat-sifat Pt Sub-Nanocluster pada Graphen Nano Sheets (GNS) di Katoda Abstrak Aktivitas katalis dari Pt subnano-kluster dengan menggunakan material pendukung graphen nano-sheet (GNS) untuk katalis reaksi reduksi oksigen (RRO) telah diuji. Aktivitas RRO dari Pt/GNS (0.99 V) lebih tinggi dari katalis komersial Pt CB (0.94 V versus RHE). Pergeseran tingkat pusat Pt 4 f pada data XPS mengindikasikan bahwa terjadi interaksi kimia antara Pt dan graphen melalui hibridisasi π–d. Kata kunci: Pt, Graphen nano-sheet, Pt subnano-kluster, RRO.

Isolasi dan Identifikasi Komponen Utama Minyak Atsiri dari Kulit Buah Jeruk Manis (Citrus sinensis L.) Asal Timor, Nusa Tenggara Timur Siburian, Rikson
Jurnal Natur Indonesia Vol 11, No 1 (2008)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Isolation and identifications of peel orange oils (Citrus sinensis, L.) which maserased by lard, coconut oil and mixof lard-coconut oil ( 2 : 1) has been done. This research aimed to obtain main component of peel orange oils fromTimor, knowing influence of lard, coconut oil and mix lard-coconut oils whom using as maserate to results ofchemistry components and atsiri’s oil rendemen product. In this research has been done by using maseration,extraction and using FT – IR and GC – MS as characterizations instruments. The results showed D- Limonen as amain component of atsiri oil from peel orange’s Timor.

Application of coconut battery waste to graphic as an alternative electrode on primary battery cells Siburian, Rikson; L Raja, Saur; Supeno, Minto; Simanjuntak, Crystina
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 2 (2019): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Coconut shell is one of the potential biomass as carbon sources. Coconut shell is converted to charcoal through the carbonization process. The potential of charcoal from coconut shells can be synthesized into graphene. Graphene is a derivative of one of the carbon allotropes, namely graphite, where carbon is in the form of thin plates with sp2 orbitals arranged hexagonally. The process of making graphene which is coconut shell dried in the sun then pyrolysis into charcoal then mixed with activated carbon as a reducing agent at 600 Â° C for 1 hour to produce graphene. The graphene produced is characterized by X-Ray Diffraction (XRD), Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX). The results by XRD analysis showed the resulting peaks were not sharp and slightly widened at the diffraction peaks at 24 Â° and 44 Â°. The results of SEM-EDX analysis at 4000x magnification show the surface size and shape of the structure that is smaller, thinner and reduced buildup on the graphene structure. graphene that has been successfully synthesized was tested on a coin battery. The coin battery cathode which was replaced with graphene succeeded in turning on the light.

Application of coconut battery waste to graphic as an alternative electrode on primary battery cells Siburian, Rikson; L Raja, Saur; Supeno, Minto; Simanjuntak, Crystina
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 2 (2019): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Coconut shell is one of the potential biomass as carbon sources. Coconut shell is converted to charcoal through the carbonization process. The potential of charcoal from coconut shells can be synthesized into graphene. Graphene is a derivative of one of the carbon allotropes, namely graphite, where carbon is in the form of thin plates with sp2 orbitals arranged hexagonally. The process of making graphene which is coconut shell dried in the sun then pyrolysis into charcoal then mixed with activated carbon as a reducing agent at 600 Â° C for 1 hour to produce graphene. The graphene produced is characterized by X-Ray Diffraction (XRD), Scanning Electron Microscope-Energy Dispersive X-Ray (SEM-EDX). The results by XRD analysis showed the resulting peaks were not sharp and slightly widened at the diffraction peaks at 24 Â° and 44 Â°. The results of SEM-EDX analysis at 4000x magnification show the surface size and shape of the structure that is smaller, thinner and reduced buildup on the graphene structure. graphene that has been successfully synthesized was tested on a coin battery. The coin battery cathode which was replaced with graphene succeeded in turning on the light.

Quick detection of sabbles by using marquis treatment Sihotang, Herlince; Ginting, Adil; Siburian, Rikson; Simanjuntak, Crystina
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 2 (2019): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Methamphetamine or N-methyl-alpha-methyl phenethyl amine is a powerful central nervous system stimulant drug that has an addictive effect when consumed. The number of cases of drug abuse in Indonesia in the last year is most dominated by methamphetamine so that an accurate analysis is needed to detect these compounds. Qualitative rapid detection can be done with marquis reagents which will produce a yellowish green if it is positive for consuming methamphetamine. Student urine samples were extracted with chloroform to separate to form two layers. The top layer filtrate was tested by Marquis reagents. From the test results found no positive Methamphentamine in the urine of class XI IPA students.

Quick detection of sabbles by using marquis treatment Sihotang, Herlince; Ginting, Adil; Siburian, Rikson; Simanjuntak, Crystina
ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 2 (2019): ABDIMAS TALENTA: Jurnal Pengabdian Kepada Masyarakat
Publisher : Talenta Publisher

Methamphetamine or N-methyl-alpha-methyl phenethyl amine is a powerful central nervous system stimulant drug that has an addictive effect when consumed. The number of cases of drug abuse in Indonesia in the last year is most dominated by methamphetamine so that an accurate analysis is needed to detect these compounds. Qualitative rapid detection can be done with marquis reagents which will produce a yellowish green if it is positive for consuming methamphetamine. Student urine samples were extracted with chloroform to separate to form two layers. The top layer filtrate was tested by Marquis reagents. From the test results found no positive Methamphentamine in the urine of class XI IPA students.

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