Surface area and porosity are the main factors that affect hydrogen adsorption at room temperature. In this work, the preparation of rice husk derived graphene (GRHC) using two different activating agents, potassium hydroxide (KOH) and phosphoric acid (H₃PO₄) without inert condition was demonstrated. GRHC KOH-activation (GRHC-KOH) exhibited larger surface area at 517.92 m²/g with higher total pore volume of 0.3346 cm³/g as compared to GRHC H₃PO₄-activation (GRHC-H₃PO₄) at 315.07 m²/g surface area and 0.1795 cm³/g total pore volume. To demonstrate the effect of surface area and porosity towards hydrogen storage at ambient condition (25 ± 2 ºC), GRHC-KOH and GRHC-H₃PO₄ were added separately via in-situ in zeolitic imidazolate frameworks-8 (ZIF-8) to form a hybrid nanocomposites of ZGK and ZGH respectively. The formation of hybrid nanocomposites depicted that the surface area and pore volume increased almost three times higher in ZGK (1632.10 m²/g and 1.1694 cm³/g) and ZGH (748.12 m²/g and 0.6489 cm³/g) as compared to pristine GRHC. At 12 bar, ZGK exhibited the highest hydrogen storage, 1.48 ± 0.01 wt. % while 1.00 ± 0.01 wt. % was obtained in ZGH. The adsorption in both ZGK and ZGH were governed by chemisorption. The improvement of hydrogen storage at ambient temperature in ZGK might be due to the synergistic effect of both GRHC-KOH and ZIF-8 which enhanced the surface area and porosity of the hybrid nanocomposites.

表面积和孔隙率是影响室温下氢吸附的主要因素。在这项工作中，证明了在没有惰性条件下使用两种不同的活化剂氢氧化钾（KOH）和磷酸（H ₃ PO ₄）制备稻壳衍生的石墨烯（GRHC）。与315.07的GRHC H ₃ PO ₄活化（GRHC-H ₃ PO ₄）相比，GRHC KOH活化（GRHC-KOH）在517.92 m ² / g处显示更大的表面积，总孔体积为0.3346 cm ³ / g 。 m ² / g表面积和0.1795 cm ³/ g总孔体积。为了证明表面积和孔隙率对环境条件（25±2ºC）下的氢存储的影响，通过原位咪唑沸石骨架8（ZIF-8）分别添加了GRHC-KOH和GRHC-H ₃ PO _4。分别形成ZGK和ZGH的杂化纳米复合材料。杂化纳米复合材料的形成表明，与之相比，ZGK（1632.10 m ² / g和1.1694 cm ³ / g）和ZGH（748.12 m ² / g和0.6489 cm ³ / g）的表面积和孔体积增加了近三倍。原始GRHC。在12 bar下，ZGK的储氢量最高，为1.48±0.01 wt.。1.00±0.01时为％   重量 在ZGH中获得％。ZGK和ZGH中的吸附均受化学吸附控制。ZGK在室温下储氢的改善可能是由于GRHC-KOH和ZIF-8的协同作用，提高了杂化纳米复合材料的表面积和孔隙率。